The eXtendable WAD editor (XWE) is an editor written by Csabo. The name comes from the fact that the editor is designed to be extensible. It is internally based around a system called XWE script, which is similar to WadC. To this end, it not only supports Doom and other Doom engine games (Heretic, Hexen, Strife), but also other games such as Wolfenstein 3D, Blake Stone, Duke Nukem 3D, and Quake. However, XWE is an old program that is no longer maintained because the developer did not have the time anymore, causing bugs and requiring editing the source and data files to work on operating systems newer than Windows XP. While the source code has been released, nobody has picked it up since.