Warlock, legs - Debilitation - Rifts have opposing effects on enemies. (healing does damage over time for a short period, Empowering reduces damage output.
Titan, Chest - One way mirror - barriers give no visibility to enemy players and buff Allies when running through them.
Hunters, Legs - Dark Ether - Sprinting for a short period of time creates dark ether that damages enemies that past through it.
Warlock, arms - Think like the enemy - Grenades land like a traps activating when enemies pass near them.
Titan, arms - Personal shield - Ward of Dawn and Barriers deploy faster, Gives second Barrier.
Hunter, Arms - Your time, is now - Void abilities kills leave shards to buff allies for a short time.