Auction Contact: Service allows sellers to send weekly updates to customers with direct links to auctions.
Auction Hawk: Services for general auctions on eBay. Images hosting, ad creation, scheduling and post-sales.
Auction Supplies: Shipping calculators, auction templates, practice boards, color charts and other tools for sellers.
AuctionLink: Creates short web addresses for eBay sellers that automatically link to users' current auctions. Free and paid options.
AuctionProfits: An auction optimization service that uses mathematical techniques to find the best auction parameters in order to save time and earn more money for sellers. [Beta testing]
AuctionSage: Management and posting services for eBay sellers. Works with Bidville also. [Windows 95/98/ME/NT/XP/2000]
Auctiva: Provides a set of different services, including posting, showcase/image hosting, counters and feedback handling.
Bay to Go: Provides SMS alerts to eBay seller's cell phone when a new bid is placed.
Ebaytools - Sourceforge: Free (Open Source) tools for watching, bidding, selling and searching on eBay auctions. All data and pictures stored in local SQL database for offline searching and viewing.
HammerTap: Offers a variety of software tools and web services to assist online auction users.
InkFrog: Image hosting, templates, feedback, emails and other support for eBay sellers.
SendPal: Offers tools to aid auction sellers in completing online selling transactions.
The Seller Sourcebook: Auction templates, listing generator, image hosting, product sourcing guide and informational articles.
Trak Auctions: Free eBay web based auction management, including counters, emails and feedback. Also offers image hosting.
Vendio: Image hosting, store manager, customer manager and other seller services.