Damage Over Time

Damage Over Time Skills and Spells are also referred to as DoTs. Generally these type of Skills will generally deal damage every second to the affected target.

Also See:
Damage Per Second

The Following Is A List Of Each Class' Skills That Deal Damage Over Time:

Witch Doctor Skills That Deal Weapon Damage Over Time

Poison Dart
Summon Zombie Dogs (Rabid Dogs)
Haunt
Locust Swarm

Wizard Skills That Deal Weapon Damage Over Time

Magic Weapon (Venom)

Follower Skills That Deal Weapon Damage Over Time

Scoundrel (Poison Bolts)