Evasion

While Obsidian has not confirmed the existence of trap sense in NWN2, it is a class feature of both the ranger and rogue class which have been confirmed.

3.5 Evasion
A character with this feature can avoid even magical and unusual attacks with great agility.

If he makes a successful reflex saving throw against an attack that normally deals half damage on a successful save (e.g. the fireball spell), he instead takes no damage.

Restrictions
Evasion can be used only if the character is wearing light armor or no armor. A helpless character does not gain the benefit of evasion.

Improved Evasion
The character only takes half damage on a failed reflex save in addition to the benefits provided by evasion, though the same restrictions apply.