Link to public repository (Github, Bitbucket, etc)
https://github.com/apoptis/ProcGen

Link to documentation
https://github.com/apoptis/procgen/blob/master/README.md

Instructions for setting up your library/tool
To use this library in your GameMaker Studio project, first import the ProcGen.yymps file by going to Tools -> Import Local Package. Then you may check the example project (rmProcGen) and use the scripts.