wadmerge
Merges WAD files for Doom engine games.
Merges .WAD files from Doom engine games, such as Doom, Doom2, Hexen and Heretic. Takes any number of input wads, and produces a sorted single output .WAD file. Runs on Linux and Windows, does not duplicate wad entries and allows space saving with an optional 'deduplication' method, where different entries which have the same data, only have the data stored once.