Update README.md

Author: typicode

README.md

@@ -37,6 +37,17 @@ See also:
 
 <p>&nbsp;</p>
 
+---
+
+[From creating mock data to converting color codes, Retool's range of 20+ developer utilities is a go-to resource when building apps. Check it out now 
+](https://retool.com/utilities/)
+
+---
+
+<p>&nbsp;</p>
+
+<p>&nbsp;</p>
+
 [Become a sponsor and have your company logo here](https://github.com/users/typicode/sponsorship)
 
 ## Sponsor