SC2Mapster

Edit: The beta key contest is still open. You just have to make a loading screen to win :)

Maps

Did you know that Starcraft II was a RTS game and Galaxy Editor its map editor. So ... we should see a lot of RTS maps right? But no! There are plenty of really inventive maps being done out there! I'm going to feature all the craziest ideas that have been achieved so far with the Galaxy Editor.

Steak Racing by irushu and brandon509

Wanna play Mario Kart? Nothing impossible with the Galaxy editor. Thanks irushu and brandon509 for that cool demonstration. This is also a good example of collaborative work using our map repository system :) The video has been made real quick. It doesn't show the jumps and sand being ejected when slowing down.

Operation Terran Shield by Hati

Not everyone wants to make 3D games. It's really easy to make 2D ones with the Editor. I don't know how to describe this game, you've got a cannon and have to shoot at incoming enemies. I'm pretty sure many of you are going to do remakes of Tetris, Bubble game ...

Tutorials

Many great tutorials have been written to help you out mapping. If you want to write one I've started a thread (thanks Mischgasm for the idea :)) that centralize what people want to see.

3rd Person Movement by Kylegar

You have all seen the Blizzcon 3rd person movement and want to reproduce it. Kylegar made a pretty nice tutorial that explains step by step how to achieve the same effect in your map!

Larva Morph into new Zerg Units by varkarrus

If you want to get started using the Data editor, varkarrus made a nice tutorial. It explains how to add new Zerg units.

I cannot feature all the work done in the community, however if you think I have missed something important just send me a PM :) If you want to learn more I suggest you to test all the maps and check out the forums.