Quote Originally Posted by PId6 View Post
(blah blah) Tome of Battle (blah, blah, blah)

(blah, blah) Eberron (blah, blah, blah)
I fully endorse this statement.

For alternative systems, psionics basics is part of the SRD, so that'll give some variation free of charge.

I'll also mention Magic of Incarnum, since it deserves more love.