Toast is great, REALbasic is wonderful.
REALbasic is a completely blatent rip-off of Microsoft Visual Basic, but that's OK, because it does such a great job of porting it, and people like myself who learnt UI-programming in VB are amazingly easily able to create programs in REALbasic, or port code from PC to Mac in one step.
It's a great program that really doesn't deserve any of the bad rap it gets from so many developers for being "Candy-programming" - pretty, tastes nice in the mouth, but not any good for you.