OBLIVION SCRIPT EXTENDER
Ian "ianpatt" Patterson, Stephen "behippo" Abel, Paul "scruggsywuggsy the ferret" Connelly, Madeesh "ShadeMe" Kannan
Additional contributions from Timeslip, The J, DragoonWraith, SkyRanger-1, badhair, JRoush, kyoma, llde.
Oblivion Script Extender (OBSE) is a modder's resource that expands the scripting capabilities of the game. It does so without modifying the executable files on disk, so there are no permanent side effects.
xOBSE is an OBSE's extension, that fixes some bugs and implements new features and capabilities. xOBSE is a sort of library and provide commands for scripting. It is necessary to several mods to make them working properly.