GitHub - run-llama/llama-hub: A library of data loaders for LLMs made by the community -- to be used with LlamaIndex and/or LangChain
LlamaHub is a library of data loaders, readers, and tools created by the LlamaIndex community. It provides utilities to easily connect LLMs to diverse knowledge sources.
Ben Auffarth • Generative AI with LangChain: Build large language model (LLM) apps with Python, ChatGPT, and other LLMs

Llama 2 - Resource Overview - Meta AI
ai.meta.com