What Dead, Cancelled, Unfinished, or Forgotten Doom Mods do you know?

[Artman2004]

Do you happen to know about any Doom mods that are lost to time? Preferably of the ZDoom or Doom 3 type. 

Edited April 5, 2020 by Artman2004 : Needed to add on to it.

[YeOldeFellerNoob]

Scythe X

[Doomenator]