Name: (CAVALIER) DEADLY CHARGE
Your mounted charges inflict great damage.
PreReq: Ride 6 Ranks, Mounted Combat, Ride-By Attack, Spirited Charge, Attack Bonus +8
Description: When mounted and using the charge action, you may declare a deadly charge before making the attack roll. If it hits, the attack deals triple damage with a melee weapon (or quadruple with a lance). Does not stack with Spirited Charge. May only be used 1/day for every 5 Base Attack Bonus.
Source: CompWar + Tim mod
Category: Combat (Mounted)

Name: (CAVALIER) FULL MOUNTED ATTACK
You may strike multiple times while your mount is moving.
PreReq: Ride 12 Ranks, Mounted Combat, Ride-By Attack, Spirited Charge, Attack Bonus +14
Description: You may make a full attack even when your mount moves up to a Single Move. This ability cannot be combined with a charge.
Source: CompWar + Tim mod
Category: Combat (Mounted)

Name: CAVALRY CHARGER
fighting from the back of a steed is second nature to you.
PreReq: Mounted Combat, Spirited Charge, Trample, Attack Bonus +6
Description: (1) Unhorse: While mounted, if you charge a mounted opponent and hit, make a free bull rush attempt. If successful, move your foe normally but his mount remains where it was. (2) Leaping Charge: While mounted, charge a foe smaller than your mount. Make a Ride check to cause extra damage (see book for details). (3) Fell Trample: You can make mounted overrun attempts against more than one foe. Your mount gets a hoof attack against each foe you successfully overrun.
Source: CompWar
Category: Combat (Mounted)

Name: MOUNTED ARCHERY
You are good at using missile weapons when mounted.
PreReq: Ride 1 Rank, Mounted Combat
Description: Penalty when using ranged weapon while mounted is halved (-2 instead of -4 if mount is double moving or -4 instead of -8 if mount is running).
Source: PH
Category: Combat (Ranged, Mounted)

Name: MOUNTED ARCHERY, IMPROVED
You can make ranged attacks from a mount almost as good as from the ground.
PreReq: Ride 1 Rank, Mounted Archery, Mounted Combat
Description: Penalty when using ranged weapon while mounted is 0 if mount is double moving or -2 if mount is running.
Source: CompWar
Category: Combat (Ranged, Mounted)

Name: MOUNTED COMBAT
You are good at fighting from the back of a mount.
PreReq: Ride 1 Rank
Description: Once per round, when your mount is hit in combat, you may attempt a Ride check (DC is the opponent's attack roll) to negate the hit.
Source: PH
Category: Combat (Defensive, Mounted)

Name: MOUNTED MOBILITY
You are skilled at dodging past opponents while mounted.
PreReq: Ride 4 Ranks, Mounted Combat
Description: If you are mounted, you and your mount get +4 AC against attacks of opportunity caused by you moving.
Source: Hero
Category: Combat (Defensive, Mounted)

Name: RIDE BY ATTACK
You can attack while riding past an opponent.
PreReq: Ride 1 Rank, Mounted Combat
Description: When you (on your mount) charge, you may move and attack as a standard charge and then keep moving. Total move can't exceed double your mounted move and must be in a straight line. No attack of opportunity is provoked from the opponent you attack.
Source: PH
Category: Combat (Mounted)

Name: SPIRITED CHARGE
You deal more damage when you charge with your mount.
PreReq: Ride 1 Rank, Mounted Combat, Ride-By Attack
Description: When you (on your mount) charge, you deal double damage with a melee weapon (or triple with a lance).
Source: PH
Category: Combat (Mounted)

Name: TRAMPLE
You know how to run over your enemies when mounted.
PreReq: Ride 1 Rank, Mounted Combat
Description: When you attempt to overrun an opponent while mounted, your opponent may not choose to avoid you. If opponent is knocked down, your mount may make one hoof (or other appendage) attack against the target (gaining the standard +4 hit bonus vs prone targets).
Source: PH3.5
Category: Combat (Mounted)