Here are a number of WADs that I do know about, however, I have no yet added them!

https://www.doomworld.com/idgames/?textmaker

Tabula Rasa
http://www.best-ever.org/download?file=tabula_rasa.wad  <-- URL looks to be unsafe!

LOVELY.WAD
http://www.mediafire.com/download/06ukx1gpif14kuq/lovelyCC.wad

Roots Bloody Roots
http://www.mediafire.com/download/rkcjbiu28cmc5i5/rbr.zip

Dunkproject
https://www.mediafire.com/?fw52cvkl9mz1n57

Moshpit / Laboratory Depths
https://www.dropbox.com/s/0j4h6sipgqgnr1q/Maps%20by%20Anon.wad?dl=0

Inhuman Resources
http://www.mediafire.com/download/jeqmu37bnjv8xq3/InhumanResources.wad

CORE
https://www.dropbox.com/s/40iz4xyja9nv2wn/CORE%20-%20vr3.wad?dl=0

fextfortress.wad
http://www.mediafire.com/download/4b0crqx087v37bz/fextfortress.wad

x-shit
http://d-h.st/6Rv
https://web.archive.org/web/20151018042836/http://d-h.st/6Rv

1024MAP01
http://www.mediafire.com/download/5s881kqcqzi6ct6/1024MAP01.wad

Carcass Causeway
https://dl.dropboxusercontent.com/u/1609613/WADs/CarcassCauseway.wad

Monastery of Apostasy and Sin
https://dl.dropboxusercontent.com/u/1609613/WADs/Monastery_of_Apostasy_and_Sin.wad

As in this WAD? https://captain-hawkes.neocities.org/wad/doom.html

[10-11] Anon map release: ASSREAL (2 maps - updated) >>3554464
https://mega.nz/#!chxQ3JzK!pkyXmRCgBHhC5rxfqw8GipPlEE7lOHbtsAVsfwUCi3g

[10-11] Anon map release: spacedadstation (updated) >>3554356
https://www.dropbox.com/s/5frggjl87fobthh/spacedadstation.wad?dl=1

[10-09] Anon map release: Unfinished three maps pasted together >>3550578
http://s000.tinyupload.com/index.php?file_id=29134100888320212439

[10-08] Anon map release: Shotgun 20 chaingunners >>3548714
http://s000.tinyupload.com/?file_id=00326809611453895724