Update README.md

README.md

@@ -536,3 +536,5 @@ Milvus adopts dependencies from the following:
 Milvus is adopted by following opensource project:
 - [Towhee](https://github.com/towhee-io/towhee) a flexible, application-oriented framework for computing embedding vectors over unstructured data.
 - [Haystack](https://github.com/deepset-ai/haystack) an open source NLP framework that leverages Transformer models
+- [Langchain](https://github.com/hwchase17/langchain) Building applications with LLMs through composability
+- [GPTCache](https://github.com/zilliztech/GPTCache) a library for creating semantic cache to store responses from LLM queries.