Two Handed Fighting

This feat decreases the to-hit penalty on glancing blows from -5 to -2.

Prerequisite: Strength 15+

Tips
Compared to PnP D&D, DDO monsters are stronger but less numerous. Kobolds, for example, attack in smaller groups but have 3-6 times the original Challenge Rating. Therefore, Feats which help you attack a group of monsters at once are relatively less valuable. Usually, DDO fighters find themselves outnumbering the monsters, not the other way around. (There are prominent exceptions, of course)

Also, bearing a shield in DDO is more protective than it was in PnP, because you can push Shift at any time for bonus AC and Damage Resistance. Thus, Feats which only work without a shield are relatively more risky.