Please note not all are included in the Retaliation pack, as far as I know.
Adepts:
Volus: stasis, biotic orbs, shield boost.
Krogan shaman: barrier, shockwave, warp.
Batarian slasher: warp, cluster grenade, lash.
Soldiers:
Turian havoc: cryo blast, havoc strike, stimulant pack.
Geth trooper: hunter mode, flamer, fortification.
Quarian marksman: marksman, tactical scan, sabotage.
Engineers:
Volus: proximity mine, shield boost, recon mine.
Turian saboteur: sabotage, sentry turret, homing grenade.
Vorcha hunter: bloodlust, incinerate, submission net.
Sentinels:
Volus mercenary: decoy, combat drone, shield boost.
Asari valkyrie (droooool, on a personal note): tech armor, annihilation field, warp.
Infiltrators:
Turian ghost: overload, tactical cloak, stimulant pack.
Drell assassin: tactical cloak, homing grenade, recon mine.
Asari huntress (again, droooool): tactical cloak, dark channel, warp.
Vanguards:
Volus protector: biotic charge, biotic orbs, shield boost.
Batarian brawler: biotic charge, blade armor, lash.