Well, I haven't seen any Abilities posted, so I'll post a few:
Desert Rush
Speed is doubled during a Sandstorm.
Examples of Pokémon with the Ability: Geodude, Graveler, Golem, Diglett, Dugtrio, Cubone, Marowak, Baltoy, Claydol, Regirock.
Conductivity
Special Defense is raised by one level when hit by an Electric-Type Move.
Examples of Pokémon with the Ability: Skarmory, Mawile, Registeel, Probopass.
Frozen Frame
The opponent has a 10% chance of being frozen when being hit by this Pokémon's Physical attacks, or when using a Physical attack on this Pokémon.
Examples of Pokémon with the Ability: Glalie, Regice, Glaceon.
Eh, I had a few others, but I can't remember them at the moment.