My current psionic rules.
Psi-crystals are optional. A psion gains a bonus feat at 1st level and may take any psionic, meta-psionic or psionic item creation feat, including "Pet Rock" to create a Psi-crystal. This feat is available to Psychic Warriors who are lonely.
Psions gain a bonus feat every 5 levels and may choose any psionic, meta-psionic or item creation feat.
see here for more feats
Upgrade power is a class ability. Anytime a psion discovers a second power from a recognized power chain (
see here ) he may "trade in" the lesser version for a different power. If he gives up a discipline power, the replacment must also come from his discipline. Note the
Trigger Chain Feat for using a higher level power to mimic a power lower on the chain.
Downshift Power is a class ability. A psion may give up a higher level power and gain it's level in lower level powers. Say a psion multiclasses as a Slayer and realizes that she missed out on several key Telepathic powers, this allows her to give up a 8th level power in exchange for Conceal Thoughts(1st),Brain Lock(2nd), Suggestion(2nd) and Mindlink(3rd).
Psionic Combat: first I added Psionic Base Attack Bonus for psions, which is the same as a fighter's BAB, but can only be used for psionic combat. Second I dropped the PsiHdbk version of the combat modes and went with
Time Waster's versions . His version drops ability damage in favor of two uniquie effects one for psi creatures and one for bonebrains. For example; Ego Whip causes non-psionic creatures to be Shaken for two rounds, but psionic creatures may not use their abilities or use psionic items for one round. He also has additional attack and defense modes based on disciplines other than Telepathy. Also note that Att/Def modes have Effective Levels, this means that 0 level modes may be manifested for free as Talents and if you take the revised Metamind, you can manifest freely any 1st, 2nd or 3rd level combat modes as if they were powers. You may also take Trigger Power feat for combat modes.
You will also find conversions at Time Waster's site to give psionic creatures power points to even the score a little.
For more info see;
RPG Cosmos
Illithid Empire
Burnt World of Athas for over a hundred powers.