Dodge (3.5)

DODGE [General]
Prerequisite: Dex 13.

Benefit: While not wearing armor or using a shield and carrying no more than a light load you gain up to a dodge bonus to your AC equal to your Dexterity modifier up to a maximum bonus of 4 + 1/4 your level.

Special: If you selected the Ascetic Combat feat before you selected this one, its maximum bonus is instead reduced to 4.

Comments
The original Dodge feat just sucked so much it wasn't funny, but its the main prerequisite for nearly everything associated with agile fighting.