best-of ranking · updated nightly

Best Open Source Developer Tools Tools

Ranked by GitHub stars — actual adoption, not editorial taste. All 10 are free, open source and self-hostable; license and last activity on every entry.

1. 1
   rea ★ 422K

   Reverse engineer anything with agents, from app behavior down to native binaries.

   MIT TypeScript pushed 2026-11-02 details →
2. 2
   ECC ★ 296K

   The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor

   MIT JavaScript pushed 2026-11-02 details →
3. 3
   react ★ 252K

   The library for web and native user interfaces.

   MIT JavaScript pushed 2026-10-31 details →
4. 4
   OpenCode ★ 224K

   AI coding agent for terminal, IDE, and desktop

   MIT TypeScript pushed 2026-11-02 details →
5. 5
   vscode ★ 194K

   Visual Studio Code

   MIT TypeScript pushed 2026-11-02 details →
6. 6
   Langflow ★ 156K

   Visual builder for AI agents and RAG pipelines

   MIT Python pushed 2026-11-02 details →
7. 7
   pi ★ 120K

   Minimal terminal coding agent you can fully customize

   MIT TypeScript pushed 2026-11-02 details →
8. 8
   caveman ★ 117K

   🪨 why use many token when few token do trick. Viral skill + proxy for coding agents that cuts 65% of tokens by talking like a caveman.

   Apache-2.0 Go pushed 2026-11-02 details →
9. 9
   Supabase ★ 114K

   Postgres-powered backend platform for production apps

   Apache-2.0 TypeScript pushed 2026-11-02 details →
10. 10
    Orca ★ 113K

    Run multiple AI coding agents in parallel, side by side

    MIT TypeScript pushed 2026-11-02 details →

last updated nightly · ranking method: github stars, live-tracked

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