- eAuction Watcher
eAuction Watcher is a user-friendly Windows tool dedicated to auction management on the Internet. It helps you quickly retrieve current information on the items you are interested in, without having to browse. You just need to select interesting items on the auctions sites, and eAuction Watcher will keep an eye on them for you! You can also keep all your favorite queries on the Auctions sites.
http://defoort.free.fr/ewatcher/

 
 - AuctionTamer
AuctionTamer is a customized tabbed Internet browser with a built-in auction item watch list. AuctionTamer makes it easy to use and switch between auction sites at eBay, Amazon, Yahoo, uBid and the FairMarket Network which includes Microsoft, Excite, Lycos, ZDNet and others.
http://www.auctiontamer.com/atindex.htm

 
 - AuctionTracker wireless
Keep in touch with your bids via your PocketPC. This a very simple to use and useful tool to track your bids on the eBay website.
http://www.pdautilities.com/