PrBoom-Plus is a modified PrBoom port with
uncapped framerate, variable gamespeed, re-record,
walkcam, chasecam, full mouselook, FOV, and other
features without loss of compatibility with the
original Doom.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
Various fixes and enhancements were made to OpenGL rendering, the automap, graphics glitches, key binding, and other things. Notably, it lets you disable specific OpenGL features instead of disabling the whole of OpenGL. Also, it allows you to keep track of the damage caused to specific things as you play.