As part of the WBGL Project, I’m writing smaller aspects of the game such as online highscores.
Here are some stuff I’ve written for Game Maker. They’re GML implementations of commonly used functions when interfacing via HTTP. All scripts are licenced under the BSD Licence.
A better, awesomer, JSON library is available here.
Encodes a string so it can be passed in a URL. It has the same function as PHP’s urlencode and is compatible with PHP.