A couple imc:
RIDDLEMASTER (General)
Your mind works quickly on puzzles and riddles.
Prerequisites: Int 13+
Benefit: Whenever you are presented with a puzzle or riddle with a time limit, you are considered to think extremely quickly and are allowed one and a half times the allotted time. Whenever presented with a non-timed riddle or puzzle you are allowed one free mistake (your subconscious warns you just before you actually make the mistake). This feat doesn’t help you with traps, locks, etc. without puzzles or riddles as part of them.
TACTICAL INITIATIVE (General)
You react with your mind, not your body.
Benefit: You may use your int modifier to initiative.
Normal: You use your dex modifier for initiative.
TACTICIAN (General)
You replace brute strength with cunning and intuition.
Prerequisites: Int or Wis 13+
Benefit: You may select feats as though you had a strength of 13.
The latter two of the three originally came from the boards here a long time ago, but I no longer know who originally wrote them.