feat: add yCode

Author: valentin-vogel

README.md

@@ -147,6 +147,7 @@ Not sure, if awesome or not? [Add to under consideration list](https://github.co
 - [Weebly](https://www.weebly.com/) - Professional websites and e-commerce.
 - [Without Code](https://www.wocode.com/) - Build faster websites, in half the time.
 - [Wix](https://wix.com/) - Build a professional website.
+- [yCode](https://www.ycode.com/) - Visual website builder and CMS, open source.
 
 ## Portfolios