Paladin

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.
 
Heal : Allows you to revive unconscious and bleeding companions to 1 hit point. Also grants additional hit points for yourself and your companions when resting in a dungeon. Doesn't affect warforged characters.