This is version 1.0 of Renegade Graphics Doom Editor.  The Best Doomed Doom Editor  there is.  This all new version has lots of great features:

     *Item editing
      -Add/Delete/Move any item
      -Control what monsters/items appear on which difficulty levels.
      -Set monsters/items to appear only in DeathMatch games
      -Make monsters 'deaf' so they only wake up when the see a player.
      -Automatically clear the level of all items of a type/all monsters/*all* items.

     *Texture editing
      -Visually select new textures for floor and ceiling, as well as visual
         display of current texture.
      -Select new textures for walls.

     *Zone editing
      -Make zones cause damage
      -Change lighting level and appearance

      *Wall editing
      -Change the attributes of walls, remove existing walls, change lines that
         were just a shadow line or door into wall.
      -Change walls into windows, windows into doors, doors into windows...
      -Make lines that monsters can't walk through.

       *Trick/Trap editing
       -Add and modify things like:
          +Crushing ceilings
          +Elevators
          +Automatic Staircases
          +Secret Doors of many types
          +Full control of TELEPORTERS
          +Lighting effects (lights go out, turn on etc.)

      *Much More!
       -Change location of end switch(s) including Secret Level switch.
       -Improved editor has lots of great new features to it like:
          +Map display zoom from 10-200% scale
          +Great new interface
          +Print maps landscape or portrait with header