diff --git a/README.md b/README.md
index 4fc5dbb..6698236 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,7 @@ This guide contains a set of papers, learning guides, and tools related to promp
 - [OpenAI Playground](https://beta.openai.com/playground)
 - [GPTTools](https://gpttools.com/comparisontool)
 - [LangChain](https://github.com/hwchase17/langchain)
+- [ThoughtSource](https://github.com/OpenBioLink/ThoughtSource)
 - [EveryPrompt](https://www.everyprompt.com/)
 - [DUST](https://dust.tt/)
 - [Dyno](https://trydyno.com/)