Auctiva
- Provides a set of different services, including posting, showcase/image hosting, counters and feedback handling.
- http://www.auctiva.com/

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.
- http://ebaytools.sourceforge.net

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]
- http://www.maxbidprice.com/

AuctionSage
- Management and posting services for eBay sellers. Works with Bidville also. [Windows 95/98/ME/NT/XP/2000]
- http://www.auctionsagesoftware.com/

Auction Supplies
- Shipping calculators, auction templates, practice boards, color charts and other tools for sellers.
- http://www.auctionsupplies.com/

Auction Hawk
- Services for general auctions on eBay. Images hosting, ad creation, scheduling and post-sales.
- http://www.auctionhawk.com/

Bay to Go
- Provides SMS alerts to eBay seller's cell phone when a new bid is placed.
- http://www.baytogo.com/

The Seller Sourcebook
- Auction templates, listing generator, image hosting, product sourcing guide and informational articles.
- http://www.sellersourcebook.com/

Vendio
- Image hosting, store manager, customer manager and other seller services.
- http://www.vendio.com/

InkFrog
- Image hosting, templates, feedback, emails and other support for eBay sellers.
- http://ww3.inkfrog.com/

Auction Contact
- Service allows sellers to send weekly updates to customers with direct links to auctions.
- http://www.auctioncontact.net/

HammerTap
- Offers a variety of software tools and web services to assist online auction users.
- http://www.hammertap.com/

AuctionLink
- Creates short web addresses for eBay sellers that automatically link to users' current auctions. Free and paid options.
- http://www.auctionlink.to/