Open source: Agents and frameworks

Code libraries for building AI agents: programs that plan steps, call tools and work through a task.

LangChainlangchain-ai/langchain
Developers who want a standard toolkit to build an AI feature or agent in Python or JavaScript.
- ★ 147,897
- MIT
- Last commit 15 Oct 2026
- Moderate to self-host
Browser Usebrowser-use/browser-use
Automating repetitive website tasks that have no API, such as filling in the same form many times.
- ★ 118,125
- MIT
- Last commit 16 Oct 2026
- Moderate to self-host
OpenHandsOpenHands/OpenHands
Handing a contained coding task to an agent while keeping it inside a sandbox.
- ★ 91,016
- MIT
- Last commit 16 Oct 2026
- Moderate to self-host
CrewAIcrewAIInc/crewAI
Splitting a job such as research then drafting then review across several agents.
- ★ 59,751
- MIT
- Last commit 16 Oct 2026
- Moderate to self-host
LangGraphlangchain-ai/langgraph
Building agents that must be reliable over long, multi-step tasks, with a human check in the middle.
- ★ 43,336
- MIT
- Last commit 16 Oct 2026
- Moderate to self-host

Other categories

Local LLMs · Workflow automation · RAG and vector databases · Voice and TTS · Image and video · Dev tools

Stars, licences and commit dates come from the GitHub API, checked 16 Oct 2026. "Last commit" is the last push to the repo. Star counts are a rough popularity signal, not a quality score. There are no affiliate links in this section: links go straight to each project.