D20 system RPGs that don't exist but should

[hong]

Hybrid d20.

http://philippe.tromeur.free.fr/hybrid.htm

 

[Mortadelo]

Flinstones d20

Wacky Races d20

C.S.I. d20

the Simpsons d20

 

[Byrons_Ghost]

D20 d20! Starting as a 1st level board lurker, take your character up through the treacherous world of game design! Go from homebrew pdf supplements, to become a mid-level freelancer, and finally the head of a major corporation!

It'll be the only game where Charismatic Hero is a prestige class...

 

[Robbert Raets]

d20 Micro Machines
Windows d20
Blackadder d20

 

[Tharkun]

Hm...How about One more point! d20? (Otherwise known as GURPS d20)

 

[gregweller]

Per some comments made in Dungeon a couple of issues back:

Naked Lunch D20 and Perdido Street Station / The Scar D20.

(Naked Lunch most likely could be done within CoC D20, I'm not so sure about the China Mieville books ...)