And the ST equivalent, STOS:

https://en.wikipedia.org/wiki/STOS_BASIC

There's a modernised build:

https://atariscne.org/news/index.php/stos-basic-v5-5-alpha-t...

And a modern descendant, AOZ Studio:

https://www.aoz.studio/

BlitzBasic(2) was also great. Hacked together bunch of games with it. Huge fun.

Ditto the ST equivalent STOS. Amiga owning friends preferred Blitz BASIC though. Unfortunately, due to one Dijkstra quote about it, people tend to be quite snobbish about BASIC.

Oh wow, I loved AMOS - it is what got me seriously into programming in the first place.