Hunyuan3D — Open-source 3D from Tencent (Free: Unlimited self-hosted)
Udio — AI music generation — 1,200 free songs/month, vocals + instrumentals (Free: 1,200 free songs/month — most generous in class)
Kling AI — Most generous free AI video — 66 daily credits (Free: 66 daily credits (1–6 videos/day))
AI Build AI — An open-source framework for building AI tools using AI-assisted development. (Free: Completely free open-source framework available on GitHub.)
Smart Connections — Local-first AI embeddings for Obsidian (Free: Free; bge-micro-v2 locally)
Meshy AI — AI 3D models — CC BY 4.0 (Free: 10 downloads/month)
Claudia — Claude Code + Obsidian + local SQLite/vector memory with provenance chains tracing facts to source documents (Free: Open source)
Llama 3.x — Best all-around open LLM — 8B to 405B (Free: Fully open; 128K context)