Doom Series Editing
You have found the way to Editing on Doom Series:
BSP - Node builder, with downloads and documentation available.
DeuTex - WAD composer tool, which can extract all types of data from WADs, and build WADs from a collection of resources.
Doom Builder - An advanced Doom, Heretic and Hexen map editor.
Enjay's little place of Doom - Personal site with a guide to sprite editing and using Dehacked.
glBSP - New standard for Doom nodes data needed for OpenGL rendering, and the node building tool to produce this data.
Noddybox - viDoom editor for DOS, with source code.
SBSoftware - Free download, help, and online registration for DeePsea, a fully featured Doom editor for Windows.
SLIGE - Computer generated levels. Screenshot, description and download.
Slump - A random map generator for FreeDoom. Offers the current version and release history.
XWE - eXtendable Wad Editor, which edits levels and associated resources for Doom levels and a range of other games.
Yadex - A level editor for Unix and Linux systems which supports the Doom games, the Doom betas, and Heretic, Hexen and Strife.
ZenNode - Fast nodes and reject builder, for Windows and Linux. Help build the largest human-edited directory on the web.