Epic Banana The Sphere
To me and probably many others this is the king of Mac Klik N Play games! Awesome site!
GameMaker Official Site
This is the offcial site of GameMaker and many other of Al Staffieri's games and programs.
Cool Dude Games
This is the site of Cool Dude Games with links, downloads, chat, message boards, news, and much more to come.
REALbasic (Geo was made with this)
REALbasic is a great program a little pricy though but worth the cost. I built Geo with it.
The Domain of Eldar
This site has great games it is the homepage of Zlateh who was formerly in MindSoft but split to be independent.