This is Forge Mod Loader. You can find the source code at all times at https://github.com/cpw/FML This minecraft mod is a clean open source implementation of a mod loader for minecraft servers. The code is authored by cpw. It implements API defined by the client side ModLoader, authored by Risugami. http://www.minecraftforum.net/topic/75440- It also contains suggestions and hints from LexManos, author of MinecraftForge. http://www.mod-buildcraft.com/forums/forum/minecraft-forge/ Finally, it contains an implementation of topological sort based on that published at http://keithschwarz.com/interesting/code/?dir=topological-sort