The Raycasting Game Maker is a free easy to use game editor that creates simple raycasting games in the style of Wolf3D. The finished game needs only two files to run, an executable and a pak file with the game data. The game runs in Windowed- or Fullscreen Mode and supports 16 and 32 bit color.
Apparently this version is a demo, and is INCOMPATIBLE with games being created in versions below v5. Mirror download can be found on creator's site. Latest version as of 08/18/15. From creator's site: The Version 5.xx uses 128x128 Resolution for Textures/Sprites and 640x400 Resolution for the Screen- Bitmaps.