Redbread is a small penny auction site for United Kingdom residents.  Redbread bills iteslf as "The People's Favorite UK Auction Site."

So Much Cheaper is a new penny auction site open to United Kingdom residents. Similar to some UK based penny auction sites, So Much Cheaper lets you place your bids via mobile text.

Bidz is a very large discount auction, selling mostly jewelry and watches at significant discounts.  Bidz is not a penny auction, however, it is very popular with consumers looking for big discounts on large ticket items, similar to penny auctions.

Winnit is a Lowest Unique Bid penny auction based in the United States.  Winnit is currently best known for hiring Nick Lachey to act as their spokesperson.

Bidso is a small United States based View Price or Reveal Price auction.  Bidso allows you to earn bids by filling out various offers from their partners, similar to the offer wall in a lot of Facebook games like Mafia Wars.

Bid4Vouchers is a United Kingdom based penny auction site exclusively offering gift cards / vouchers for auction.  Bid4Vouchers accepts bids online as well as from your mobile.

Flutteroo is a small auction site for United Kingdom residents only.  Flutteroo features 3 types of auctions, Penny Auctions, Lowest Unique Bid auctions and View Price Auctions.

Cents Encheres is a small penny auction site for France and Belgium residents only.

MadBid is a popular United Kingdom based penny auction site that has gotten quite a bit of press lately. MadBid allows you to bid using your mobile phone, which is unique among penny auction sites.

BuyLow Auctions is a USA based penny auction site, where if the winning bid is over $20, they cover the difference to ensure that no item is sold for over $20.  BuyLow Auctions offers a 3 day trial of 10 bids for $4.95 to get started, and monthly discounted bid purchases thereafter.

Snaglo is a medium sized penny auction site based in the United States. Snaglo offers 10 free bids to new users when they make their first bid pack purchase.

Famdabidosy Auctions is a small United States based Penny Auction site. Famdabidosy Auctions offers 10% cash back for friend referrals and hosts Set Price, Totally Free and Night Auctions.

Haggle is a large, United States based Penny Auction site open to United States bidders only. Haggle auctions vary in two ways: by the price increments and the time added to the clock.  

BidHere is an Australia based Penny Auction site. BidHere offers a wide variety of auction features, such as Cash Back, Speed and $0 auctions.

Winners24 is a small, United States based Penny Auction site. Winners24 offers Free Shipping on all items worldwide and activates new auctions every 30 minutes.

BidCactus is a large, United States based Penny Auction site. BidCactus auctions are open from 9 am to 5 pm Eastern Time, Monday through Friday. BidCactus offers specials such as Wacky Wednesdays and Happy hour Fridays.

BidRivals is a global Penny Auction site, with dedicated sites in over 20 countries. BidRivals has a wide assortment of auction items, offering many features, such as Buy It Now and Use Lost Bids.

Swoopo is one of the best known Penny Auction sites. Started in Germany in 2005, Swoopo has expanded worldwide to the United States as well as South Korea. Swoopo has a very large selection of items and features attracting a large number of users from all around the world. Enter promotion code fb0374 to get 3 free bids at registration.

GoBid is a popular Penny Auction site open to Unites States bidders only. Their auctions are open daily from 6 am to 10 pm Pacific Time. GoBid auctions offer some of the more exciting Penny Auction features, such as Trade Items for Bids, as well as regular promotions to get Free Bids.