>>282475194
poiyomi is a top one with lots of options, and is extremely user friendly, actually coming with built in tutorial links for each subsection.

then there's two local vrgers that have their own shaders as well. Acill and Rhyperior. 

Acill's shader, a branch off of UTS2, has a lot of options and shader autism potential, but is held back by a lack of user friendliness. But there's more than a few out there who use it and would be more than happy to share their recommended settings.

Rhyperior has his own toon shader, works pretty well, updates often, a few use that as well.

old and busted tier:
Xiexe
I mean it works, but there's better alternatives.
NoeNoe
does this even get updated anymore
Arktoon
Arktoon is great but is no longer supported, and might break once the 2018 update rolls around. for all intents and purposes, Poiyomi has largely replaced it in functionality

Oh shit what are you doing nigger tier:
Cubed Toon Shader
no longer supported updated or anything, and pretty lacking functionality wise these days.