Ice Troll

Ice Shield - has a 5/7.5/10/12.5/15% chance to block the attack completely (like evasion) and also slow down the attacker for 0.5/1/1.5/2/3 seconds.
Regeneration - regenerates 1/2/3/4/5 hp every 5 seconds.
Frost Attack - has a 5/10/15/20/25% chance to freeze the opponent for 5 seconds. (Like freezebomb)
Snowstorm (ultimate) - freezes everyone (10/20/30/40/50 feet) at their place around the troll for 4 seconds.

Ranger

Elven vision - has a 5/10/15/20% chance of turning on "elven vision" at the start of the round: you basically have something like nightvision on, except it is all light blue(ish) and you see all the other races clearly (even the invisible ones).
Exceptional Bow - additional of 4/8/12/16% damage with each shot that hits.
Entangling arrows - has a chance of 5/10/15/20% to entangle a person for 2 seconds.
Windwalk (ultimate) - you disappear completely (like nebula without the cloud) and you get an increased speed of 200 for 1/1.5/2/2.5 seconds.