Here is a list of Groupon and Woot clones and copycats which are created around group-buying, coupons, or discount offers (although some of them are quite innovative, so to call them clones or copycats may not be entirely fair. In the case of some of them they are competitors or alternatives to Groupon. Also, I believe some of them actually predate Groupon which would mean they weren’t copycats or clones):
Shnoop.com is a daily deal website, that offers a deeply discounted product everyday but gives you a second chance a 2nd day on “yesterday’s shnoop”. Everyday a new deal is introduced.
Other Social Buying and Discount Websites
2) Living Social
3) The Deal Map
4) Offer Mint (unavailable)
5) Cheap Today (focuses on Sears, Kmart, Target, Kohl’s, Calvin Klein, and Walmart. )
6) Deal On (Saavy Circle)
7) Offer Matic
8] At Cost-city by city
9) Groupful (not available)
10) Appsumo-is internet application and sofware deals.
11) Brads Deals
In addition there are a range of coupone sites like Love a Coupon, Coupon Tweet, Coupon Graavy, Coupon Printster. For further info on discounts and coupons you can find info at Deals.Alltop. You may also like this list of Woot Clones.