diff --git a/README.md b/README.md
index 4ad25e62..bc634341 100644
--- a/README.md
+++ b/README.md
@@ -126,6 +126,8 @@ editing for your IDE or custom editor
 * [Typst](https://typst.app/) - Compose, edit, and automate technical documents
 * [Kedyou](https://kedyou.com/) - Digital workspaces for tutoring
 * [Lightpage](https://lightpage.com/) - Personal living notebook
+* [reearth-flow](https://github.com/reearth/reearth-flow) -
+  Collaboratively calculate and convert various data
 
 ## Table of Contents