An interesting anti- Indian (KID, Grunfeld, Benoni) system with little theory to learn:
This has lately become fashionable even at top level chess, albeit mainly at fast time controls. A Grunfeld without a knight at c3 isn't effective, while a reversed KIA/French is no plain sailing either, as white's extra tempo is really useful. Most logical is 5...c5, when white has a choice between a reversed Tarrasch a tempo up with 6.Nc3 cd4 7.ed4 d5 (about equal, but it may appeal to many if the like Tarrasch-like formations) and 6.d5, which is an odd Benoni with a pawn on e3 and the bishop shut in, but still Black's road to equality is not easy.
That was actually very informative,heck i might even give it a shot,infact i know some grunfeld players who would be very unpleased about not bieng able to play the "normal" grunfeld(when the Knight is on c3) against me :).
Incidentally, this is what Colle-ites have been playing against the "Sneaky Grunfeld" for aeons, lots of times with b4, trying to open up lines against c5, where they try to prove the fianchettoed bishop is misplaced for this particular defensive task.
I think the Exchange variation is a serious try against the KID below 2000, especially if you study it for a while and really understand what both sides are trying to achieve. It gives a big psychological advantage, as black players hate it and are likely to think you're only trying to avoid complications to achieve a boring draw.