[minionslave]

This seems pretty cool. It gave me a Android App inventor vibe. My question is how much flexibility do get. Because drag and drop UI/App builders constrain you into a design philosophy that's hard to change.

All this to say, I wasn't convinced.

[creolabs]

Creo is not just a drag and drop UI/App builder. You can easily create UI with drag and drop but you are always allowed to write more complex interaction or code using a programming language.