Mgccl's Ivory Towerso tired

Imagefilter() have many powerful usages, like turn a image grayscale or do some blur actions. The small note at the bottom of the manual usually will make you want to say something negative about your hosting.

Note: This function is only available if PHP is compiled with the bundled version of the GD library.

Again, I will save you!

Kris Cieslak created a few JavaScript games using YUI.

Green Felt contain a lot good looking solitaire game created in JavaScript.

Chipbench a Amiga Workbench clone

If you think everything you just saw is impressive, checkout Racing, the first real 3D environment implementation in JavaScript. (Canvascape uses ray casting a semi 3D engine)