XAgent

smolagents is a lightweight agent framework from Hugging Face for quickly building tool-using LLM agents.

OctoTools is an agentic framework with extensible tools for complex reasoning, featuring a tool card system for flexible composition of diverse reasoning capabilities.

Letta (formerly MemGPT) is an open-source framework for building stateful AI agents with advanced reasoning and transparent long-term memory. It allows you to visually test, debug, and observe agents.

Flexible and powerful framework for managing multiple AI agents and handling complex conversations across providers like OpenAI, Anthropic, and AWS Bedrock.