A curated list of awesome Model Context Protocol (MCP) servers.

LMArena is an open platform where everyone can easily access, explore and interact with the world’s leading AI models. By comparing them side by side and casting votes for the better response, the community helps shape a public leaderboard, making AI progress more transparent, and grounded in real-world usage.

Sonar – LLM served by Perplexity Playground

CL4R1T4S: Full extracted system prompts, guidelines, and tools from OpenAI, Google, Anthropic, xAI, Perplexity, Cursor, Windsurf, Devin, Manus, Replit, and more – virtually all major AI models + agents!

Intro to AI Safety, Remastered

Hugging Face – The biggest platform for open-source AI models

LangChain – The most popular library for building apps powered by LLMs

Perplexity is a free AI-powered answer engine that provides accurate, trusted, and real-time answers to any question

Artificial intelligence designed for collaboration – with AI Agents that can research, solve problems, and create content for you and your team