A repository containing the current ScriptCards API development code for Roll20 (https://roll20.net) and example/community ScriptCards macros
ScriptCards_API contains the current version of ScriptCards as a .js file. There is also an Archived folder there for versions created prior to using GitHub.
ScriptExamples contains sample ScriptCards scripts.
X_OtherScripts contains various other items not necessarially related to ScriptCards, but related to Roll20.
Will M. has also put up a repository with his ScriptCards and other Roll20 stuff in it : https://github.com/MadCar-Dev/Default
The ScriptExamples folder is divided into "libraries", "system-neutral", and folders for each system-specific set of scripts.