RetailMeNot.com. With an easy search function, a shopping forum and loads of coupons to great stores.

Rather Be Shopping.com. This site gives you several options to find what you're looking for, including alphabetical listing of stores, the most current deals, and a section for free shipping.

CouponMountain.com. They feature a lot of favorite stores and gives you lots of different options to find what you're looking for.

Anycoupons.com. It may be a little overwhelming at first but they have a ton of great deals.

Fatwallet.com. Browse for coupons by store for multiple current deals, or by most recent, expiring, and free shipping.

DealCatcher.com. Features both online and printable coupons and rebate notices.

CouponWinner.com. This site is well-organized and the coupon codes are prominently displayed in red.

TheGreenApple.org. This is a specialty site focusing on eco-friendly products, including clothing and apparel.

CouponAlbum.com. This site has sub-categories under your main choice, when you're in women's apparel; you can narrow down to coupons, then to free shipping.

New Zealand-owned daily deals company 1-day has today announced it is pulling the plug on its standalone voucher and coupon deals website 1-dayout, to instead concentrate on growing its highly successful core offering of selling discounted products online.
"It's been a great ride while it lasted. As market leaders, we came into the voucher deals business in August last year with a plan to provide great offerings in way of deals for consumers and vendors – a concept that we believed would provide an ongoing win/win/win for all parties, But in reality the only real and sustainable win is for the consumer – they get real discount deals from vendors and don't need to show any kind of loyalty, all they need to do is buy vouchers offering various deals and than just redeem it .
"The research shows the model has a negative impact on the vendor's long-term brand value and can create negative buying patterns."

A Facebook version of discount coupon sites like Groupon and LivingSocial has been launched in five American cities. Facebook "Deals" will offer users money off everything from concerts to kayaking .
The service is limited to San Diego, San Francisco, Atlanta, Dallas and Austin at the moment, but Facebook hopes to expand the discount coupon service to other cities if this trial is successful.
The current leader in the discount coupon field, Groupon, with 70 million members, rejected a $6 billion takeover offer from Google last December. Facebook has more than 600 million users and if it opens up "Deals" worldwide, has the potential to dwarf Groupon.
The online discount coupon industry is one of the fastest-growing business sectors in the world. Some sites offer better deals if friends buy in. Others require a minimum number of purchases before a deal becomes available. However, many discount coupon offers have no strings attached.