Bard

Balance : Allows you to recover your balance when knocked down.
 
Bluff : Allows you to bluff certain NPCs, or make a monster vulnerable to a sneak attack.
 
Concentration : Allows you a chance to continue casting a spell when you would normally be interrupted.
 
Diplomacy : Allows you to negotiate more effectively with certain NPCs and to encourage monsters to find targets other than yourself.
 
Haggle : Allows you to negotiate better prices with vendors.
 
Hide : Allows you to sneak past monsters, avoiding their sight.
 
Jump : Allows you to jump higher.
 
Listen : Allows you to hear approaching enemies.
 
Move Silently : Allows you to sneak past monsters, avoiding their hearing.
 
Perform : Allows you to use and improve your musical ability to inspire and fascinate.
 
Swim : Allows you to swim faster and for a longer period of time underwater.
 
Tumble : Allows you to tumble and roll away from attacking enemies.
 
Use Magic Device : Allows you the ability to use magic devices which you normally couldn't use.