Windsurf — AI-native editor with Cascade agent — free tier with GPT-4.1 and Claude access (Free: Free tier with GPT-4.1 and Claude access; generous limits)
aidaemon — Rust AI daemon — Telegram interface, 40+ tools, ~10MB idle, SQLite+vectors (Free: Open source; cron scheduling)
Cursor — AI-first code editor with intelligent completions and refactoring (Free: Starter plan: basic completions free)
Udio — AI music generation — 1,200 free songs/month, vocals + instrumentals (Free: 1,200 free songs/month — most generous in class)
AI Build AI — An open-source framework for building AI tools using AI-assisted development. (Free: Completely free open-source framework available on GitHub.)