Welcome to X-Tended.
X-Tended is a set of modifications for the X-Universe games created by Egosoft.
Currently there are two X-Tended mods. The first is called The X-Tended Mod, and is the mod that created X-Tended as a term in it's own right. The X-Tended Mod was, and still is, one of the largest and best loved modifications for X3: Reunion.
The latest mod from the X-Tended team is for the newer game X3: Terran Conflict, and is still under development.