I was going to say that it sounds a little like that Smalltalk IDE Squeak, and then it dawned upon me that this is actually a Smalltalk dialect too. :D
And a third option that is much leaner and maybe less overwhelming especially if you are interested in actually learning Smalltalk itself to begin with:
I'm going to throw this in here:
"Squeak or Pharo for the beginning Smalltalker?"
https://stackoverflow.com/questions/8426981/squeak-or-pharo-...
And a third option that is much leaner and maybe less overwhelming especially if you are interested in actually learning Smalltalk itself to begin with:
https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev