Nine West 15% (this just started, so take advantage!!)
J. Crew 15% (sometimes they ask for a valid student email-with .edu, so be prepared:)
Ann Taylor 15%
Banana Republic 15%
Club Monaco 20%
The Limited 15%
Urban Outfitters 10% (but, not all locations offers the discount.)
Do you know of any other good discounts others should know about? Please share.