Official DnD 3.xx has at most 3 sources of power. Divine, Arcane, and Psionic. That is it. No more and no less. The only differences between the classes which use these power sources was how they were cast and accessed. If you use Arcana Evolved, best 3.xx variant out there, there is only one source for power.
Now with 4e we have Martial power source, Divine power source, Arcane power source, Primal Power source, Psioinc power source, Soul Power source, Shadow Power source, and so forth and so on.