AutoGPT — AutoGPT kicked off the autonomous agent craze. Give it a goal, and it breaks it down into tasks, executes them, and iterates until done. The evolution: - Started as a viral GitHub experiment - Now a full platform for building agents - Agent Builder for no-code agent creation - Marketplace for sharing and monetizing agents The original vision of "AI that does things for you" keeps getting refined here. Open source at its core.

LangChain — LangChain is the framework that powers most production LLM apps you've used. It's the plumbing behind the magic. What it provides: - Chains: Connect LLM calls with logic - Agents: LLMs that decide what actions to take - RAG: Retrieval-augmented generation made easy - Memory: Persistent context across conversations If you're building anything serious with LLMs, you'll probably touch LangChain. Python and JS/TS support. Huge ecosystem.