.NET Aspire is an opinionated, cloud ready stack for building observable, production ready, distributed applications in .NET

A programming language for writing tests that go beyond simple unit testing

Storybook is a development environment for UI components. It allows you to browse/develop/test a component library based on React & React-Native.

Open-source repository containing structured Python and AI knowledge for the Py.AI website.

A free, fast and beautiful API request builder.

The next-generation project management platform

DevDisplay is the First Global Platform for Developers to Fulfill All Their Tech Needs. A paradise for developers, where they can Connect ▸ Collab ▸ Code ▸ Create ▸ Conquer — all in one place.

Saleor is a high-performance, GraphQL-first e-commerce solution created with Python and Django. https://getsaleor.com/

A fast line-by-line code for computing high-resolution infrared molecular spectra

A C-inspired language for interaction with the shell.

Computer Science Topics

Open Standard for Metadata. A Single place to Discover, Collaborate and Get your data right.

Find and redact secrets that leak into AI coding agent histories, such as Claude Code sessions.

Send files directly between devices over encrypted, serverless P2P WebRTC. No uploads, no signup.

Ruby on Rails application building framework

A modern, AI-powered full-stack voice assistant built for 2026. Lisa combines real-time speech recognition, intelligent LLM responses, live web search, browser geolocation, cloud memory, and natural neural voice synthesis into a seamless conversational experience.

Grade exams fast and accurately using a scanner 🖨 or your phone 🤳.

.NET is a cross-platform runtime and libraries for cloud, IoT, and desktop apps.

Self-hosted iOS & Android simulator streaming so the whole team can test mobile apps directly from a browser, using the Mac you already own with no external cloud.

A lightweight macOS native app that intercepts URL clicks and forwards them to the right browser based on running state and power source

Stack Overflow command line client. Search and browse Stack Overflow without leaving the terminal.

Open-source desktop Minecraft launcher for Windows and Linux with isolated instances, Modrinth, automatic Java, diagnostics, and safe backups.

A collection of code to print out "Hello World!" in different languages.

open source, low-latency, high quality voice chat software primarily intended for use while gaming

C compiler for the CLI platform

A curated, community-driven list of the best tech, software engineering, and developer marketing newsletters. Stay up-to-date with top-tier insights across AI, DevOps, Frontend, and more.

Windows Forms also provides one of the most productive ways to create desktop applications based on the visual designer provided in Visual Studio. It enables drag-and-drop of visual controls and other similar functionality that make it easy to build desktop applications.

Entity Framework Core is a lightweight and extensible version of the popular Entity Framework data access technology.

Go implementation of OpenTelemetry, a working name of a combined OpenCensus and OpenTracing project. It provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

A private, in-browser AI summarizer for articles, videos, and PDFs. Runs entirely on-device via WebGPU or WebAssembly, or against your own local Ollama instance. No backend, no API keys, no cloud.

A safe home for all your data

Java bindings for Roc Toolkit (real-time audio streaming)

TypeScript/Vite frontend template with a built-in gated autonomous agent loop.

Cross-platform desktop AI agent for coding, documents, and desktop work, built around a Rust runtime.

Core formulae for the Homebrew package manager

A to-do list application built in React and Electron.

MyFinances is a web application that can help you as an individual, or team manage your finances! It utilizes the django framework for the backend.

A Python framework for modular, self-contained skill management for machines.

Open source Slack-alternative in Golang and React

Open-source infrastructure for AI backends. Kubernetes for orchestration, Okta for identity.

A programming assignment submission system

Open cloud security platform for AWS, Azure, GCP, Kubernetes, Github, M365 and more. Prowler performs security assessments and compliance checks with hundreds of built-in controls for security frameworks like CIS, NIST 800, NIST CSF, CISA, FedRAMP, PCI-DSS, GDPR, HIPAA, and more.

Free, multilingual bereavement compliance checklist for families in Europe. Open-source data and web service.

An open specification and runtime for representing, testing, and auditing the evidence, rules, exceptions, uncertainty, and escalation criteria behind AI-agent decisions.

The OpenTelemetry Python Contrib project. OpenTelemetry provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

OpenID/Connect, OAuth2 and WS-Federation server based on IdentityServer4 or Duende IdentityServer with its admin UI

A project designed to help you familiarize yourself with the open source contribution workflow on GitHub, as well as to help you learn the basics of programming in different languages.

A web-based tool to visualize popular sorting algorithms with animations, built using React and Material-UI.

Python implementation of OpenTelemetry, a working name of a combined OpenCensus and OpenTracing project. It provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

Fast and minimalist 3D viewer

OpenTelemetry auto-instrumentation and instrumentation libraries for Java. OpenTelemetry is a working name of a combined OpenCensus and OpenTracing project. It provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

A Python package for multivariate hypothesis testing

OpenVINO™ is an open-source toolkit for optimizing and deploying AI inference.

Chrome DevTools extension that unifies React render timeline, performance, memory-leak detection, useEffect audit, CLS monitoring, Redux state inspection, and AI analysis into one panel.

Open-source alert management and workflow automation platform.

JabRef is a reference management software that uses BibTeX and BibLaTeX as its native formats and is therefore typically used for LaTeX. What makes JabRef development special is that two developers will review each pull request to ensure high quality.

Free, open-source AWS certification practice exams (CLF-C02 and AIF-C01) with explained answers, timed mock exams, and domain practice. No signup, no ads, MIT licensed.

A set of FREE Api's that allow you to fill your application with mocked data

A basic app to track your car's maintenance events, like fixes, oil changes, etc.

A collaborative online office suite based on LibreOffice technology

Governed shared memory for AI agent fleets — multi-agent, multi-tenant, MCP-native. Trust tiers, keystone policies, audit trails, knowledge graph, self-improving retrieval. Apache 2.0.

Realtime collaborative markdown notes

Proof-of-Antiquity blockchain with hardware attestation - rewards vintage hardware miners (PowerPC G4/G5, POWER8) with RTC tokens

Probably the most modern lightweight distributed farm of Vulnerable Applications built for handling wide range of vulnerabilities across tech stacks.

Theia is a cloud & desktop IDE framework implemented in TypeScript.

Keploy is a functional testing toolkit for developers. It generates E2E tests for APIs (KTests) along with mocks or stubs(KMocks) by recording real API calls. KTests can be imported as mocks for consumers and vice-versa.

Query, provision and manage cloud, SaaS and identity resources using SQL.

an open source layer that delivers resilience and manageability to object-storage based data lakes

Time zone add-on for moment.js

Symfony is a PHP framework for web applications and a set of reusable PHP components. Symfony is used by thousands of web applications and most of the popular PHP projects.

cpersist is a C++ data persistence and serialization library.

A fast and efficient JVM that delivers power and performance when you need it most.

C++ implementation of OpenTelemetry, a working name of a combined OpenCensus and OpenTracing project. It provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

A Python package to assess and improve fairness of machine learning models.

Distributed, high-performance SQL database

Production-Grade Container Scheduling and Management

Context governance for agentic AI — tamper-evident audit trails for LLM context inputs

An open-source Android prototype for on-device assistive perception, reproducible evaluation, and evidence-bounded accessibility research.

Discord bot that watches BookMyShow and DMs you the moment tickets open. Self-hosted with one command, no API keys.

A search-engine for openly-licensed media, part of the WordPress project

Finds and mechanically fixes what the MCP 2026-07-28 spec revision breaks in your server. 21 rules, 5 autofixers, and a graded board of real servers.

Stateful memory runtime for AI agents that enables persistent memory, context, and continuity across sessions.

The Guake drop-down terminal

A beginner-friendly open source learning lab with a DevOps glossary that helps newcomers make their first real open source contribution.

Open-source observability for LLMs, based on OpenTelemetry

An extensible Lua-configured Unix shell

Meshery enables collaborative design and operation of cloud and cloud native infrastructure. Meshery is an extensible, self-service engineering platform.

Execution-grounded semantic (Type-4) clone detection for JS/TS — finds functions that behave the same but are written differently, then runs them in a sandbox to prove which one is wrong.

Git Extensions is a standalone UI tool for managing git repositories. It also integrates with Windows Explorer and Microsoft Visual Studio (2015/2017/2019).

A curated directory of developer podcasts for software engineering teams. It is an open-source collection of podcasts that covers system architecture, cloud-native, DevOps, B2B SaaS, AI/ML, and engineering leadership.

Specification of OpenTelemetry, a working name of a combined OpenCensus and OpenTracing project. It provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

Free SVG icons for popular brands.

The one step solution to get relief from your stress. Live a stress-free life by using our website.

FreshRSS is a self-hosted RSS and Atom feed aggregator. It is lightweight, easy to work with, powerful, and customizable.

A neo-brutalist React component library built with Tailwind CSS, featuring zero-gap layout logic, automated YIQ contrast calculation, and high structural stability.

Julia is a high-level, high-performance dynamic programming language for technical computing. http://www.julialang.org

phpMyAdmin Bringing MySQL to the web

Fully local AI assistant that watches your screen (windows, clipboard, screenshots) so you can query your own activity history instead of re-explaining context to an LLM every time. Runs on Ollama + a local vision model, nothing leaves your machine.

Local-first, CRM-style web UI on top of the career-ops job-search pipeline — runs on 127.0.0.1, no cloud, no telemetry, no auto-submit. Vanilla HTML/CSS/JS.

A simple markdown viewer built with Python, designed for desktop users to open `.md` files directly.

Community bounty board for RustChain ecosystem - earn RTC tokens for contributions

An open-source transport-layer data proxy providing zero-code-intrusion state checkpoints and instant kernel failovers for long-running AI agent workloads.

Bitwarden is the easiest and safest way to store all of your logins and passwords while conveniently keeping them synced between all of your devices. This repository houses all Bitwarden client applications except the Mobile application.

Header-Only C++ Library for Graph Representation and Algorithms

Model Context Protocol server for The Colony. Exposes 7 tools, 4 resources, and 3 prompts to MCP clients (Claude Desktop, Cursor, etc.).

A Loyalty Card & Ticket Manager for Android

icalendar parser library for Python

Plone Aurora is the React frontend to Plone, a free and open source content management system that is used to create, edit, and manage digital content. Plone is an open source content management system that is used to create, edit, and manage digital content, like websites, intranets and custom solutions. It comes with over 20 years of growth, optimizations, and refinements. The result is a system trusted by governments, universities, businesses, and other organizations all over the world.

A native macOS paint app in Swift. The raster engine, PaintKit, is a UI-free SwiftPM package with no third-party dependencies, so `git clone && swift test` runs the whole suite with the command-line toolchain alone. Contributors do not need Xcode, a GUI session, or a dependency resolve.

Javascript database for traditional SQL queries. Smaller and faster alternative to sql.js

An interface-centric real-time communication engine to connect Things at the edge of the network and develop distribute embedded applications.

A cross-platform UI framework for .NET

An open-source AI-powered learning platform with intelligent tutoring, adaptive assessments, and personalized study tools. Full-stack application with NestJS backend, React frontend, and Flutter mobile app.

An opensource identity and access management platform as an alternative to Auth0

Terminal-first, self-hosted AI gateway with provider-free prompt enhancement, a credential-free local demo, and nine governed MCP tools for Codex and other hosts.

The Wikimedia Commons Android app allows users to upload pictures from their Android phone/tablet to Wikimedia Commons. Initially started by the Wikimedia Foundation, this app is now maintained by volunteers.

wger is a free, open source web application that manages and tracks/logs your exercises and personal workouts, weight and diet plans. It can also be used as a simple gym management utility and offers a REST API as well, for easy integration with other projects and tools.

KubeIntellect lets operators ask Kubernetes questions in plain English, gathers live evidence from cluster tools such as kubectl, Prometheus and Loki, and pauses for explicit human approval before destructive operations. It is a research system rather than a production-certified product: synthesized tools are validated and approval-gated, but currently execute in-process rather than in an isolated container. Python, FastAPI and LangGraph; AGPL-3.0.

Ptera Software is a fast, easy-to-use, and open-source software package for analyzing flapping-wing flight.

wger is a free, open source flutter application that manages and tracks/logs your exercises and personal workouts, weight and diet plans.

Zero-knowledge encrypted pastebin. Data is encrypted in the browser before it ever reaches the server.

Give your AI agent a real browser. MCP server + Chrome extension for task-level browser automation.

The OpenTelemetry .NET Contrib project. OpenTelemetry provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

This repo contains the curriculum of Techtonica, a tech training program for women and non-binary adults with low incomes.

Computer algebra library for .NET

The OpenTelemetry JavaScript Contrib project. OpenTelemetry provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

UI for Apache Kafka is a free, open-source web UI to monitor and manage Apache Kafka clusters

A minimalist HTML5 battle royale game.

TripAi is a powerful AI-based travel planning web application that helps users effortlessly generate customised trip itineraries. By leveraging Meta’s Llama 3.8B Instruct model and integrating real-time data from Amadeus APIs, TripAi delivers intelligent and practical trip suggestions – including flights, hotels, and personalised activities.

An open source, cloud-native programming language optimized for integration.

Open-source Python toolkit for water data, hydrology, and agricultural water management. Unifies 15 global water-data sources behind one schema, with Bulletin 17C flood frequency, baseflow separation, FAO-56 crop water requirements, and an AI methodology recommender. Issues are scoped with clear acceptance criteria and a first-issue to second-issue to area-owner contributor ladder.

The OpenTelemetry website and documentation. OpenTelemetry provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

The NuGet Client tools. Includes 'nuget.exe' and the NuGet extensions for Microsoft Visual Studio and Microsoft WebMatrix

Open-source Windows maintenance CLI and TUI. Dry-run by default, Recycle Bin only, fully undoable.

AI-powered Moodle plugin for tutoring, quizzes, mind maps, RAG course materials and beginner-friendly open source contributions.

CLI-agnostic AI job-search automation - pipeline tracking, offer evaluation, CV generation, and zero-token job scanning

PowerShell for every system!

Content curation tools for Kolibri Learning Platform (the offline app for universal education)

A CTF-style, moba, top-down shooter made in Godot.

The parallel browser engine project

A community-curated collection of simplified and example-driven man pages.

Fission is a framework for serverless functions on Kubernetes.

Cake (C# Make) is a free and open source cross-platform build automation system with a C# DSL for tasks such as compiling code, copying files and folders, running unit tests, compressing files and building NuGet packages.

ToolJet is an open-source low-code platform for building and deploying internal tools with minimal engineering efforts 🚀

Free, open-source voice dictation and speech-to-text for Linux, macOS and Windows — hold a key, speak, release, and the text is typed into whatever window has focus. Runs on the CPU with faster-whisper; nothing leaves the machine by default. Also transcribes recordings and captures meetings with speaker labels. No cloud, no API key.

A systems programming language focused on safety, speed, and concurrency.

Transform your boring GitHub contribution grid into high-performance, shareable Cricket Player Cards! GitCric maps your developer activity (commits, pull requests, issues, streaks, and languages) into dynamic cricket ratings, custom specialties, and career statistics.

Async MySQL ADO.NET library for .NET and .NET Core

A daily-updated community curated directory of developer events taking place all over the world. It covers SaaS, DevOps, and AI events with dates, location, and registration links.

API documentation for .NET

Organizing the information that matters to you and your teams. The knowledge of your world.

🦀 An open source payments switch to make Payments fast, reliable, and affordable.

A faster Python type checker and language server written in Rust

PyTorch is an open source machine learning library based, used for applications such as computer vision and NLP.

A role-aware, permission-enforced benchmark for evaluating AI agents that operate HPC systems — SLURM job control, telemetry inspection, RBAC, documentation and facility tasks. Runs are trace-based and reproducible against deterministic environment snapshots, and a permission violation hard-fails the task rather than being scored as a near miss. Some environments are grounded in telemetry from a real production supercomputer.

A headless React data table with batteries-included adapters for Mantine, MUI, Chakra UI, Ant Design, Radix, Base UI and shadcn/ui, plus an unstyled path for Tailwind. Tables become mobile cards automatically.

PHP implementation of OpenTelemetry, a working name of a combined OpenCensus and OpenTracing project. It provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

Maintain the translations of your documentation with ease (PO for anything)

Static analysis for Django models (VS Code extension + Python CLI + MCP server for AI agents). Zero database, zero Django boot, zero credentials — just parse models.py. Translations, docs, small CLI fixes, and golden fixtures all welcome as first contributions.

Kibana lets you visualize your Elasticsearch data and navigate the Elastic Stack so you can do anything from tracking query load to understanding the way requests flow through your apps.

Infisical is an open-source, E2EE tool to sync environment variables across your team and infrastructure.

Assembly programming game: program the 8086-like microprocessor of a robot in a grid-based multiplayer world

Linux feed reader for GNOME/GTK

A GitHub bot to automate repeatedly tasks

A lightweight but powerful source code editor which runs on your desktop and is available for Windows, macOS and Linux.

A local-first Solana transaction policy firewall and tamper-evident receipt ledger for AI agents.

Help improve the PowerShell extension for Visual Studio Code!

A Vulnerable Web Application for DAST developers, Students and DAST consumers.

Sandstorm is a self-hostable web productivity suite. It's implemented as a security-hardened web app package manager.

ClickHouse is a fast open-source OLAP database management system

A toolkit for .NET projects

The http://freeCodeCamp.com open source codebase and curriculum. Learn to code and help nonprofits.

Consul - Open Government and E-Participation Web Software Edit

Volatile is a high-performance, UCI-compatible C++ chess engine built from scratch, currently playing at a 2200-2400 Elo. We are looking for contributors of all skill levels to help us bridge the gap to top-tier engines. This project serves as a fantastic, beginner-friendly learning ground for modern C++ systems programming, clean architecture (SOLID principles), and game AI. Current high-priority tasks include integrating Efficiently Updatable Neural Networks (NNUE), implementing Monte-Carlo Tree Search (MCTS), optimizing time-management algorithms, and improving our testing and CI/CD infrastructure. Whether you are making your first open-source contribution or you are an expert eager to tackle complex optimization problems, your ideas are warmly welcomed here!

A full-stack AI agent platform built with Python and TypeScript.

🎥✨ A TikTok live streaming recorder tool written in Python. Capture and relive your favorite TikTok moments effortlessly. 🎥✨

Generation of diagram and flowchart from text in a similar manner as markdown

Dependency security scanner for AI coding agents — scans vulnerabilities, licenses, typosquats in your project.

Learn production backend engineering through runnable failure cases with broken code, failing tests, fixes, and production notes.

Security-first, self-hosted AI agents with container isolation you can prove, not just promise. Runs untrusted agent code in hardened sandboxes. Written in Go.

The Microsoft Build Engine (MSBuild) is the build platform for .NET and Visual Studio.

Collector for OpenTelemetry, a working name of a combined OpenCensus and OpenTracing project. It provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

A free, open source, community-focused unit testing tool for the .NET Framework.

Python-based continuous integration testing framework.

The CRM we wished existed - pipeline ops, follow-up discipline, and SDR visibility without enterprise pricing. React + Express + PostgreSQL.

Core functionality needed to create .NET projects, that is shared between Visual Studio and the .NET CLI

Orchestration and automation platform to execute millions of scheduled and event-driven workflows declaratively in code and from the UI

Build custom CRUD apps that talk to any API or database. All without HTML or CSS.

A local-first trainer for algorithm interviews. It records what you say and what you type on one clock, then shows you the stretches where you were coding in silence.

Design, Test and Document APIs in plain Markdown. Compose Requests with API blocks. Reuse, Replace & Version everything just like code. Offline, Truly Git Native, No Lock-in.

Jupyter’s Next-Generation Notebook Interface.

A minimalist PDF creation library for Python

A smart launcher for Mac. Powered by JavaScript.

Cross platform Native mobile apps with JavaScript

Cross-platform, friend-to-friend and secure decentralised communication platform.

Web based translation tool with tight version control integration.

Go bindings for Roc Toolkit (real-time audio streaming)

Discord bot that securely links and verifies GitHub accounts with Discord accounts, with org/repo/team verification and automatic role sync.

.NET implementation of OpenTelemetry, a working name of a combined OpenCensus and OpenTracing project. It provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.

Claude Code agent coordination skill for multi-agent task orchestration

Local-first Japanese speaking practice app for Korean learners with Expo, FastAPI, and local STT/TTS.

.NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop.

The Electron framework lets you write cross-platform desktop applications using JavaScript, HTML and CSS.

Deterministic orchestrator for 30+ CLI AI coding agents (Claude Code, Codex, Aider, Cursor, Goose, etc.). Git worktree isolation, HMAC audit trail, MCP server mode.

The Solidity Contract-Oriented Programming Language

chroot, mount --bind, and binfmt_misc without privilege/setup for Linux

A bulk file downloader for Windows, with real-Chrome extraction over CDP, aiohttp streaming, a WebView2 GUI and a headless CLI.

Open-source CLI that turns private git history into an NDA-safe skill credential. Metadata only, the code never leaves the machine. Many starter issues are one-line additions to a JSON signature database, no code required.

The OWASP Cheat Sheet Series was created to provide a concise collection of high value information on specific application security topics.

A web platform for disabled people to find and rate locations!

The free and open source social network for active citizenship.

Browser extension and self-hosted FastAPI backend that tailor a resume and cover letter to a job posting using your own OpenAI, Claude or Gemini API key

An ORM for node.js supporting PostgresQL, MySQL, sqlite and MSSQL

Beginner-friendly open-source lab for practicing Git, GitHub, issues, pull requests, CI, and maintainer workflows.

TypeScript is a superset of JavaScript that compiles to clean JavaScript. It adds static typing and next-level ECMAScript features to JavaScript.

Orleans - Distributed Actor Model

A super fast Graph Database uses GraphBLAS under the hood for its sparse adjacency matrix graph representation. Our goal is to provide the best Knowledge Graph for LLM (GraphRAG).

Interactive learning platform using Python and Javascript with AngularJS

A declarative, efficient, and flexible JavaScript library for building user interfaces.

Img2Num is a cross-platform library that converts raster images such as PNG and JPEG into clean, layered SVG paths. It is designed for high performance with WebGPU acceleration, minimal dependencies, cross-platform support, and bindings for multiple programming languages.

The .NET Compiler Platform ("Roslyn") provides open-source C# and Visual Basic compilers with rich code analysis APIs.

An open-source, nonprofit activism network

OSS alternative to Google Authenticator & Authy

JavaScript SDK for writing applications using Dapr

Short, unique IDs that carry a prefix telling you what they belong to — user_a1b2c3, order_9f8e7d. Readable, secure, and typed — for TypeScript and JavaScript alike.

ASP.NET Core is a cross-platform .NET for building modern web applications on Windows, Mac, or Linux.

Contrib repository for the OpenTelemetry Collector. OpenTelemetry provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools.