Atmosphere

A JVM framework by JetBrains for building predictable, fault-tolerant, enterprise-ready AI agents across all platforms — from backend services to Android, iOS, and in-browser environments, with built-in MCP and multi-provider LLM support.

Ouroboros 是一个规范驱动的多智能体开发框架，从传统的提示词工程转向规范驱动开发模式，支持多 Agent 协作、MCP 工具集成和自动化工作流编排，适用于高质量 Agent 系统构建。

AG2（前身为 AutoGen）是一个开源的 AgentOS，提供多 Agent 对话框架，支持灵活的 Agent 编排、工具集成和分布式协作，适用于构建复杂的多智能体系统。

Agent-oriented programming framework for building LLM applications in Java. Provides agent abstractions, tool calling, multi-agent collaboration, and other core capabilities for enterprise Java ecosystem integration.