Helmets:

N7 Helmet - Increases health by 5%
N7 Breather Helmet - Increases health by 5%
Kuwashii Visor [Omega] - Increases headshot damage by 10%
Death Mask [Tuchanka] - Increases negotiation bonus by 10%

Chest: 

N7 Chestplate - Increases power damage by 3%
Capasitor Chestplate [Citadel] - reduces the delay before your shields start regenerating by 10%
Aegis Vest [Citadel] - Increases health by 5%
Shield Harness [Tuchanka] - Increases shields by 5%

Shoulders: 

N7 Shoulder Guards - Increases weapon damage by 3%
Amplifier Plates [Illium] - Increases power damage by 5%
Strength Boost Pads [Omega] - Increases melee damage by 25%
Asymmetric Defense Layer [Tuchanka] - Increases health by 5%

Arms: 

N7 Guantlets - Increases health by 3%
Heavy Damping Guantlets [Tuchanka] - Increases shields by 5%
Off-Hand Ammo Pack [Citadel] - Increase spare ammo capacity by 10%
Stabilization Gauntlets [Omega] - Increase weapon damage by 5%

Legs: 

N7 Greaves - Increase shield strength by 3%
Stimulator Conduits [Omega] - Increase storm speed by 10%
Life Support Webbing [Citadel] - Increase health by 10%
Ordinance Packs [Omega] - Increase spare heavy weapon ammo by 10%

Mass Effect 2 DLC Armor Sets:
Blood Dragon Armor [Bonus from Dragon Age: Origins] - Increases power damage by 15%, Increases shield strength by 10%
Terminus Assault Armor [Preorder Bonus] - Increases storm speed by 10%, Increases shields by 15%, Increases all weapons reserve ammo by +1
Inferno Armor [Preorder Bonus] - Negotiation bonus of 10%, Increases power damage by 10%, Increases storm speed by 10%
Collector Armor [Collector's Edition Bonus] - Regenerate 10% faster, Increases storm speed by 10%, Increases health by 20%


DLC Armor Helmets:

Umbra Visor [Dr. Pepper promotional item] - Increases power damage by 5%
Recon Hood [Dr. Pepper promotional item] - Increases weapon damage by 5%
Sentry Interface [Dr. Pepper promotional item] - Increases shield strength by 5%