Classes & Prestige
(To be filled....)
Feats
Mage Slayer (ComArc) (AoO) - Can't cast defensively but knows it on things you threaten
Defensive Sweep (PHB2) (AoO) - Adjacent foes that don't move away during their turn provoke AoO
Supernatural Instincts (Fiend Cod 2) (AoO) - If foe you threaten uses Supernatural ability you get AoO
Expert Tactician (Comp Adv) (AoO) -
You and all allies get a +2 circ bonus to melee attack and damage rolls against any enemy you hit with an AoO for 1 round. Doubly awesome if you have Imp. Trip, 'cause then you just have to hit with the touch attack, and don't necessarily need to succeed on the opposed roll.
Dragonmark Mastery (Dragonmarked, p138) (IA) - Spend 1 action point to use your Dragonmark's SLA as a Swift or Immediate action.
Robilar's Gambit (PHBII) (AoO)
Karmic Strike (CW) (AoO)
Stormguard Warrior (ToB) (AoO)
Snap Kick (ToB) (AoO)
Improved Combat Reflexes (Drg #340) (AoO)
Greater Combat Reflexes (Drg #340) (AoO)
Backstab (Drg #340) (AoO)
Dutiful Guardian (DotU) (IA) Let's you switch places with an ally.
Clever Opportunist (DotU) (IA) Switch places with an enemy you hit with an AoO.
Expert Timing (KoKPG) (IA-effectively, limited)
Expert Timing [General]
You can time your attacks for maximum effect.
Benefit: You can delay your action without losing your normal initiative. You may take your action later in the round and then return to your normal initiative the next round. You can even go simultaneously with an enemy who goes on a lower initiative. You can use this feat to attack a wizard trying to cast a spell, thus forcing him to make a concentration check to keep from losing the spell (if you cause damage, of course)
Evasive Reflexes (ToB) (AoO)
Sidestep (Miniatures Handbook) (AoO)
Opportunistic Tactician (Dragon 340) (AoO)
Clarion Commander (ToB) (AoO)
allows for a few new options in creating or providing AoO's to allies. The Pile On option combos quite nicely with Hindering Opportunist (PHBII): aid an ally through every attack they make. Throw in Improved or Greater Combat Reflexes for more hitting them power.
Deft Opportunist (Miniatures Handbook) cancels out enemy Mobility.
Double Hit (Miniatures Handbook) (AoO) hit with offhand weapon, in addition to primary.
Items
Serpent Armor (MIC) (AoO)
Bracers of Opportunity (AoO)
Spells & Powers
Spells(To be filled....)
PowersCatfall (EPH) (IA)
Divert Teleport (EPH) (IA)
Empty Mind (EPH) (IA)
Evade Burst (EPH) (IA)
Fate of One (EPH) (IA)
Fiery Discorporation (EPH) (IA)
Grip of Iron (EPH) (IA)
Hypercognition (EPH) (IA)
Intellect Fortress (EPH) (IA)
Mental Barrier (EPH) (IA)
Mind Trap (EPH) (IA)
Prowess (EPH) (IA)
Thought Shield (EPH) (IA)
Tower of Iron Will (EPH) (IA)
Psionic Draw (DSCS) (IA)
Anticipatory Strike (RoD) (IA)
Evade Breath (RotD) (IA)
Change Fate (ME) (IA)
ANTICIPATORY STRIKE (CompPsi) (IA)
DAMP POWER (CompPsi) (IA)
EVADE ATTACK (CompPsi) (IA)
FROM THE BRINK (CompPsi) (IA)
MIND OVER ENERGY (CompPsi) (IA)
Miscellany
Thicket of Blades (ToB:BoNS) (AoO)