VJ Base, short for Vrej Base, was established in 2012 with the aim of assisting in the development of various addons. It is popularly used to create scripted NPCs, thanks to its highly customizable and sophisticated artificial intelligence systems. For an overview of its capabilities, please refer to the feature list in the Steam Workshop page.
Steam Workshop Page: http://steamcommunity.com/sharedfiles/filedetails/?id=131759821
Change Logs: https://github.com/DrVrej/VJ-Base/releases
Official and Unofficial Addons (Discontinued): http://steamcommunity.com/sharedfiles/filedetails/?id=1080924955
Want to make an addon using this base? Read this page: https://github.com/DrVrej/VJ-Base/wiki