Update August 2016: The download link was broken, so that's been fixed. I have also added instructions down below.
One of the things that always irked me about Wolfenstein 3D is that its control scheme is a little too oldschool. The game features what I'd call 'strafe mode', instead of dedicated strafe keys, so you can't really play it like you would any other FPS. So online I found there's a top-notch port of Wolfenstein 3D to windows called Wolf4SDL. I grabbed the source code, made it so your left/right keys always make you strafe, and made it so the mouse doesn't move you forward/black, and boom, now I can actually play Wolf3D!
Download it here. Extract this zip into your Wolf3D folder. If you don't have Wolf3D, just go get the shareware version. Source code can be found here. This will not work with Spear of Destiny.
How to play