What is your single favorite open-source LLM project (AutoGPT, BabyAGI, MiniGPT-4, ...)?

I have lost track of how many projects that build on LLMs and OpenAI API I’ve already checked out on GitHub. My favorite is AutoGPT, but there’s a Cambrian explosion of open-source LLM-based tools. What is the one project that has impressed you most that builds on LLMs, including OpenAI API?