Well, if you were willing to spend 60$ you could buy a Smalltalk package suited for commercial applications which looked somehow like Windows. But that's not the topic here anyway.

> Maybe we're talking past each other but the IDE says the community edition is only authorized for GPL software, every other edition is big bucks.

Do not let this mislead you. The software is available under GPL. That is all you need to know. And GPL allows you to use the software for any purpose. Maybe I should mention that I studied law for two years and then had one more year of lectures in patent and license contract law (see my profile for more information).