The following mods below are what we have gathered. Check them out!
Brutal Doom
http://www.moddb.com/mods/brutal-doom
Complex Doom
http://www.wad-archive.com/wad/4a87b6ee9a16687188764b78a25498d5
NeoDoom
https://www.doomworld.com/idgames/levels/doom2/Ports/m-o/neodoom
Super Sonic Doom
http://www.moddb.com/games/doom-ii/downloads/super-sonic-doom
HDoom
http://hdoomguy.tumblr.com/
Terminator