Invocation-using classes [3.5]

[Dead_Jester]

"Toolbox of at-will magic-y stuff" - you can include Binders, Truenamers, Incarnum, a few others.

Well, Trunamers would qualify if they weren't completely and irrevocably broken...

If your group is ok with that, you might want to check the homebrew boards, as there is a lot of quality invocation-using/at-will magic stuff there.