Wow Coupons is another site that offers a variety of coupons. Not only do they have online coupons but they have printable coupons for brick and mortar stores. They have an astounding collection of coupons for nearly all of the most popular brands.
Coupon Cabin has been around for years. They update their site daily with online coupons for the most popular stores. You can view by most used coupons, compare prices, favorite deals, or check out their money saving forum. They also offer a printable coupon section.