Top OSS GitHub Repositories & Tools (2026)

Get tasks and ideas out of your head. A free GTD to-do app for desktop and mobile. Works offline, no account needed

✨ Zero-config AI chat assistant. No API key needed — sign up and instantly chat with GPT-5, Claude 4, Gemini 2.5, DeepSeek & 100+ top models. Pay-as-you-go saves you more. Available on Web, iOS, macOS, Android, Linux, Windows.

Custom GeForce Now Client Named OpenNOW

Cross-platform native GUI library for 🦀 Rust

A framework for building native applications using React

The local-first AI assisted research workspace for scientific writing & publishing. Research, Write, Compile, Verify and Publish in LaTeX • Typst • Markdown • Git-native • Open Source • Desktop Performance

Widelands is a free, open source real-time strategy game with singleplayer campaigns and a multiplayer mode. The game was inspired by Settlers II™ (© Bluebyte) but has significantly more variety and depth to it.

A modern and intuitive terminal-based text editor

🚀 Pytorch Distributed native training library for LLMs/VLMs with OOTB Hugging Face support

A Weather app for android with multiple sources 🌦🌞☔

📨 The ultimate agentic social media scheduling tool 🤖

Spring Cloud Alibaba provides a one-stop solution for application development for the distributed solutions of Alibaba middleware.

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

DOMPurify - a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify works with a secure default, but offers a lot of configurability and hooks. Demo:

Empower the Web community and invite more to build across platforms.

A framework that allows developers to cobble together a better UI for their own WPF applications with minimal effort.

Open Source Wealth Management Software. Angular + NestJS + Prisma + Nx + TypeScript 🤍

:electron: Build cross platform desktop apps with ASP.NET Core (Razor Pages, MVC, Blazor).

Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API

static analysis of C/C++ code