diff --git a/readme.md b/readme.md
index d99a402..68f5bba 100644
--- a/readme.md
+++ b/readme.md
@@ -936,6 +936,7 @@
 - [npm semver calculator](https://semver.npmjs.com) - Visually explore what versions of a package a semver range matches.
 - [CodeSandbox](https://codesandbox.io/s/node-http-server-node) - Online IDE and prototyping.
 - [Amplication](https://github.com/amplication/amplication) - Auto-generates fully functional apps.
+- [RunJS](https://runjs.app) - Desktop JavaScript playground.
 
 ### Community