JBidwatcher - JBidwatcher is a free eBay tool that's easy to use, multiplatform, and allows you to snipe, bid, and track auctions.
Myibidder - Myibidder (Myibay) is a Free Auction Bid Sniper service for eBay.
BayGenie - eBay auction sniping service.
Bid-O-Matic - Bid-O-Matic or Biet-O-Matic (BOM) is an Open-Source desktop tool that allows for observing auctions...
Auction Bidding Sniper for eBay - Play your cards close to your vest, and your eBay bids even closer by doing your own eBay Auction sniping.
Segbay - Win more auctions, find items faster on eBay with Segbay, Auction sniper and item alert software.