e21f17a6_nd_Windows_software_Collection__2
[0] RealBasic [1] Ok, this beats the shit out of Visual Basic in functionality, portability, and cost. Basically Visual Basic for Linux, Mac OS X, and Windows; compiles for all three as well. If you want to write GUI based applications easily and quickly for Mac, Windows, or Linux, this is it. If your a VB programmer and you already have code written in VB on Windows there is a project converter :) [2] 
DEMO
D E M O
S h a r e w a r e
Mohawke's Best of the Best Free and Open Source Software Collection: Mac OS X and Windows software Collection
2