If you've used Ask.com lately you may or may not have noticed the spiffy new menu option of Deal$.
Ask Deal$ is like an uber coupon search engine, it goes through store ads, online specials, and even the top coupon forums like fatwallet, retailmenot, and slickdeals to find deals, coupon codes, and even printable coupons.
I gave it a spin and it's pretty niffty if you have something specific in mind you're looking for.
It's especially helpful with bar options of Hot deals, expiring soon, recently added, free shipping if you're looking to order something online, and printable coupons. Makes for easier surfing of deals as well as sorting by categories.
I would bookmark this search engine feature if only not to have to hunt down coupon codes from various sites or to see if they have something specific for a certain store.