A fun project found on the mailing list (I'm sure you all follow that?)

https://gambas-playground.proko.eu/?gist=07db52169ef8b747d26f8bee4a4a19e9
https://gitlab.com/prokopyl/gambas-playground

This looks like a quick way to check ideas or small sections of code. Its rather like: W3Schools Online Web Tutorials …but for Gambas.

Docs in the wiki: /playground - Gambas Documentation

 I have already used it. It works well. I have even changed a few examples on Rosetta Code stating that the code can be run for people who don't have Gambas and how to do it using this site.

It can also be a great asset for this forum to show how stuff work.