CouponMom.com

CouponMom offers printable coupons for grocery shopping and restaurants, breaks them down by state, offers free sample and offers up strategies to get the most out of your coupons.

CouponKim.com

Offers up Grocery, online and printable coupons as well as a selection of free samples.

CoolSavings.com

Offers numerous printable coupons divided up by the style of shopping they are for. Also includes listings of free samples you can apply for. Bit heavy on the advertising, so make sure to read everything carefully before you click on it.