DeuTex is an editor able to compile and decompile WAD files. It was written in 1994 by Olivier Montanuy based upon DEU and originally ran in DOS. It was later ported to various UNIX systems, Linux and Microsoft Windows (with a graphical front-end, WinTex). It is currently maintained by André Majorel.
DeuTex is distributed under the terms of the GNU General Public License.