Bracers of Retaliation: 5,000 gp, Magic Item Compendium 82
Daze melee attacker (1 round, DC 10 + spell level will save, immediate action 3/day, sacrifice spell)
Burnoose of 1,001 Thorns: 3,000 gp, Magic Item Compendium 83
1d6 piercing damage natural weapon attacker/grappler (5 rounds, 1/day)
Cloak of the Salamander: 6,000 gp, Magic Item Compendium 88
1d6+7 fire damage to melee (non-reach) attacker (immediate action 3/day)
Cloak of the Salamander, Greater: 36,000 gp, Magic Item Compendium 88
1d6+7 fire damage to melee (non-reach) attacker
Cloak of Thorns: 26,000 gp, Magic Item Compendium 88
1d4+3 piercing damage to melee (non-reach) attacker, +2 enhancement bonus to natural armor
Counterstrike Bracers: 2,500 gp, Magic Item Compendium 90
Attack of opportunity after missed attack (2/day)
Ectoplasmic Feedback: 8,000 gp armor special ability, Libris Mortis 75
1d6 damage to incorporeal melee attacker
Energy Defense: +1 armor special ability, Magic Item Compendium 11
1d6+10 energy damage to melee (non-reach) attacker (5 rounds, immediate action 3/day)
Excruciating Ring: 8,000 gp, Drow of the Underdark 99
2d6 nonlethal damage melee attacker (immediate action 5/day)
Fiery Kabuto of the Celestial Dragon: 9,000 gp, Dragon Magic 101
1d6 fire damage to melee (non-reach) attacker (10 rounds, standard action 1/day)
Fortifying Defense: +2, +3, or +5 armor special ability, Dungeon Master's Guide II 251
Attacker can't make critical hits or sneak attacks (1d4 rounds, 25%, 50%, or 100% chance, DC 20 will save)
Gnashing: +1 armor special ability, Champions of Ruin 40
1d6 piercing, slashing,and bludgeoning damage grappler
Hamatula Barbs: +2 armor special ability, Planar Handbook 78
1d8 slashing and piercing damage to melee (non-reach) attacker
Hellsteel: 25,650 gp armor, Champions of Ruin 41
1d6 fire damage grappler
Lightning Tunic: 8,000 gp, Magic Item Compendium 114
2d6 (1 charge), 3d6 (2 charges), or 4d6 (3 charges) electricity damage melee (non-reach) attacker (3 rounds, 3 charges/day)
Pitspawn: 600 gp armor or shield template, Dungeon Master's Guide II 278
1 damage melee attacker
Retaliation: +2 armor special ability, Magic Item Compendium 14
1d6 damage melee attacker (attack must deal 10+ damage)
Retributive Amulet: 9,000 gp, Magic Item Compendium 121
Deal damage to melee attacker equal to half damage of attack (immediate acyion 3/day)
Retributive Amulet: 56,000 gp, Book of Exalted Deeds 116
Take half damage (rounded down) from melee attack, melee attacker takes half damage (rounded up), +2 sacred bonus to AC
Ring of Vengeance: 4,500 gp, Magic Item Compendium 128
5d6 damage to melee attacker that scores a critical hit (3/day)
Rings of Force Armor: 30,000 gp, Magic Item Compendium 128
1d4 force damage to melee (non-reach) attacker
Robe of Retaliation: 6,500 gp, Magic Iem Compendium 130
1d6/spell level damage to melee attacker (immediate action 3/day, sacrifice spell)
Robe of Thunder: 38,000 gp, Magic Item Compendium 206
2d6 sonic damage to melee (non-reach) attacker (5 rounds, 3/day)
Skin of Fiery Response: 60,000 gp, Magic Item Compendium 171
4d4+4 fire damage to attacker (1/round, ranged touch attack)
Starver: +2 armor special ability, Underdark 151
2d6 slashing damage to grappler/swallower