This thread is about the greatest game ever: Dink Smallwood! Dink Smallwood is a game you can download for free here. The game includes a very powerful editor which allows you to make your own game. Hundreds of fan-made adventures can also be found here.
I doubt many of you ever heard of this game, but you should really check it out. It's seriously the best piece of software to create your own game from scratch I've ever seen.
So what's this game about? The game is very Zelda-like but with very sadistic humor (beating pigs, headless ducks, some dude hitting your aunt so you kill his sorry ass, etc.) and ofcourse the magnificent editor.
Here's a screenshot of the original game:
And here are two screenshots of fan-made games to show what you can with the editor:

Someone is porting this game with all its mods to the PSP, and it's already playable in a form. The game is also playable in Linux.
Dink Smallwood has a small, fruit-obsessed community, so drop by some time at The Dink Network!











But it's just so AWESOME.
It's Frogger made from the ground up in the Dink Smallwood engine. Just to show how versatile the editor is. You can create almost anything as long as it's 2D.