add HippoRAG (#605)

README.md

@@ -620,6 +620,7 @@ Please review our [CONTRIBUTING.md](https://github.com/EthicalML/awesome-product
 * [fastRAG](https://github.com/IntelLabs/fastRAG) ![](https://img.shields.io/github/stars/IntelLabs/fastRAG.svg?style=social) - fastRAG is a research framework for efficient and optimized retrieval augmented generative pipelines, incorporating state-of-the-art LLMs and Information Retrieval.
 * [Finetuner](https://github.com/jina-ai/finetuner) ![](https://img.shields.io/github/stars/jina-ai/finetuner.svg?style=social) - Finetuner provides an effective way to improve performance on neural search tasks.
 * [GraphRAG](https://github.com/microsoft/graphrag) ![](https://img.shields.io/github/stars/microsoft/graphrag.svg?style=social) - GraphRAG is a data pipeline and transformation suite that is designed to extract meaningful, structured data from unstructured text using the power of LLMs.
+* [HippoRAG](https://github.com/OSU-NLP-Group/HippoRAG) ![](https://img.shields.io/github/stars/OSU-NLP-Group/HippoRAG.svg?style=social) - HippoRAG is a novel retrieval augmented generation (RAG) framework inspired by the neurobiology of human long-term memory that enables LLMs to continuously integrate knowledge across external documents. 
 * [llmware](https://github.com/llmware-ai/llmware) ![](https://img.shields.io/github/stars/llmware-ai/llmware.svg?style=social) - llmware provides a unified framework for building LLM-based applications (e.g, RAG, Agents), using small, specialized models that can be deployed privately, integrated with enterprise knowledge sources safely and securely, and cost-effectively tuned and adapted for any business process.
 * [Mem0](https://github.com/mem0ai/mem0) ![](https://img.shields.io/github/stars/mem0ai/mem0.svg?style=social) - Mem0 enhances AI assistants and agents with an intelligent memory layer, enabling personalized AI interactions.
 * [MindSQL](https://github.com/Mindinventory/MindSQL) ![](https://img.shields.io/github/stars/Mindinventory/MindSQL.svg?style=social) - MindSQL is a Python RAG library to streamline the interaction between users and their databases using just a few lines of code.