Top TypeScript GitHub Repositories & Open Source Projects (2026)

The Open Framework for Building Agents

Desktop app to manage markdown knowledge bases

The first open-source harness builder for AI coding. Make AI coding deterministic and repeatable.

🌐 The open-source Agentic browser; alternative to ChatGPT Atlas, Perplexity Comet, Dia.

Run any coding agent, on your own servers, from anywhere

The open-source repo for docs.github.com

A Unicode canvas for humans and AI. Draw diagrams, interfaces, and slides as editable text.

UI components I'm building to learn interaction design

Composio powers 1000+ toolkits, tool search, context management, authentication, and a sandboxed workbench to help you build AI agents that turn intent into action.

Unbounded context. Memory that manages itself. One session, for life. The hippocampus for coding agents, part of CortexKit.

TypeScript-first schema validation with static type inference

A free, browser-based editor for creating stunning screenshots and visuals. No signup, no watermarks.

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

The open-source docs framework for humans and agents.

A lightweight, cross-platform IDE for the AI era, with on-demand tools and services.

Claude Code GUI plugin for JetBrains IDEs. (ex - Claude Code with GUI)

Grist is the evolution of spreadsheets.

A progressive Node.js framework for building efficient, scalable, and enterprise-grade server-side applications with TypeScript/JavaScript 🚀

React Flow | Svelte Flow - Powerful open source libraries for building node-based UIs with React (https://reactflow.dev) or Svelte (https://svelteflow.dev). Ready out-of-the-box and infinitely customizable.

Real-time code feedback for pi — LSP, linters, formatters, structural analysis