UnderWare Design - Creators of PlayBasic. This is a Basic programming language. Has lots of useful features. 

YoYo Games - Creators of Game Maker. Make games without having to program!

ParkProductions - Makers of retro games. Check out RoboCop! 

Classic Retro Games - Remakes of retro games. Quite an impressive list.

deviantART - Check out my gallery.