TED is a full screen editor that allows editing of the ENDOOM data. At the moment, TED does not allow direct editing of the IWAD or a PWAD, although this may be added in the future (if I can figure out from the DEU source how the WAD is organised :)
WinTex lets you customise your DOOM, HERETIC or HEXEN levels beyond what is possible with level editors. It let you replace sounds, musics, and monster sprites, and let you create new wall textures, floors and ceilings. And it will collaborate wi
ZenNode will read the level description from a .WAD file and create either a new BLOCKMAP resource, REJECT resource, and/or NODES/SEGS/SSECTOR resources. Levels in a .WAD may be specified on the command line, or, if none are specified, all of the maps