Leather Armor

Unique Leather Armors - * indicates it appears dependent off material, not just an enchantment
Advocate's Armor (+24k): 1/day when hit by a crit or sneak attack, inflict a lesser geas on the attacker, DC19 to resist
Arachnid Harness (+5k): Can climb at full speed, maintain dex to AC while climbing, never fall when taking damage while climbing
Armor of the Sands (+10k): Permanent endure elements, can see in sandstorms, dust storms, and similar. 1/day as swift or immediate, treat yourself as incorporeal vs one attack for damage.
Armor of the Tireless Warrior (+16740): 1/day, use waves of fatigue. 1/day, take no penalties from fatigue/exhausted for 10mins, take 1d6 nonlethal at end of time. If barb, +2 rage rounds per day.
Blackfingers Apron (+1080): 1/day, produce a tanglefoot bag that expires if not used within 1 minute. 1/day use negate aroma (1 hour duration)
Boneless Leather (+11000): +5 to Escape Artist, +5 to Acrobatics to reduce fall damage, +5 CMD, DR5/P or S
Catskin Leather (+14000): No ACP, No Max Dex, +5 Competence to Acrobatics, Half damage from falling, when wearer would be killed via damage from attack or spell, take half damage but armor is destroyed
Diviner's Blight (+15000): 1/week, spend 1 minute picking a creature, divination magic of 7th level or below treats you as that creature. Spend 1 minute to end, only works for living creatures.
*Djezet Skin (+2250): Remove as free action, made of metal, no ACP, 0% ASF, +5 circumstance on diplomacy to ask from from friendly or helpful creatures.
Dragonform Armor (+22960): Pick a dragon on creation, 1/day use form of the dragon 1 for chosen dragon.
*Eel Skin Armor (+7900): +5 Competence on Escape Artist and Swim. 1/day, form aura doing 2d6 electric and stagger to adjacent each round for 5 rounds, DC14 reflex for half and no stagger.
*Enchanted Eelskin (+6250): While underwater, gain the shadow ability, ability to breathe water, and swim 30ft, and can take a full round of actions during surprise rounds.
Gray Master's Leathers (+810): 1/day each of acid splash, dancing lights, mage hand
Kimle Coat (+1140): +5 Swim, 1/day breathe water for 1 minute
Lupine Rageskin (+11000): While raging, turn into a medium wolf as Beast Shape 1, and armors enhancement bonus becomes an enhancement bonus to natural armor.
Milante Armor (+1620): 1/day when adjacent ally falls unconcious, CL3 CLW as a swift action. If you fall unconcious, automatically use on self if not yet used.
Morlock Hide (+4000): Appear as a scarred eyeless creature, +2 circumstance to Acrobatics, Climb, Escape Artist. Move at full speed while squeezing and no penalty to AC or attack
Perfect Leather (+2700): 1/day each guidance, stone fist, touch of fatigue
Purgatory's Cowl (+20015): Face is always hidden in deep shadow. 1/day as immediate when reducing undead to 0 or less, +2 CL with spells with the [death] descriptor or from the death or repose domains for 1 hour.
Red Stalker Armor (+1875): +5 competence on bluff to feint
Scouting Leather (+890): +3 competence to stealth, if disguises as a cultures normal clothing via glamered, change into +3 to diplomacy with that culture.
Spiritwalk Armor (+6000): 5/day, use vanish. If mythic, may spend 1 mythic power while doing so to become incorporeal for 1 round.
*Wizard's Mail (+1190): Priced higher, but it's just leather armor made of mithral.
Armor of the Shadow Lord (+33500): +4 Max Dex, No ASF, +1d6 sneak attack if you can already sneak attack - Note, is an intelligent item, +26500 if you remove the intelligent part.
Psionics - Leather of Confined Spaces (+5000): +5 enhancement bonus on escape artist and CMB to escape grapples. 1/day reduce size by one category as per compression psionic power.