Wolf3D Data Compiler
"This is a new program/editor being created for the community by Adam Biser. WDC stands for Wolf3D Data Compiler and is a full-featured editor for Wolfenstein 3-D and Spear of Destiny. WDC also works with Blake Stone 1 and 2, Operation BodyCount, Corridor 7, Catacomb 3D, the Catacomb trilogy, and Commander Keen 4-6. However, some of these additional games have only partial functionality. The help file contains a chart detailing available functionality for each game."
--DieHard Wolfenstein Bunker