- Turbo Lister - eBay's free listing tool that allows you to customize your listings, upload and edit items in bulk and manage your auctions. Essentially for bulk posting.MarketWorks - A complete auction management solution. Automate your listings, email correspondence and more.
Infopia - Manage and integrate every aspect of your eBay business with the rest of your e-commerce ventures.
AuctionSound - Web based auction management tool with a primary focus on eBay Trading Assistants and consignment sellers.
Meridian - Automatically calculate shipping, send invoices and process payments. View customer profiles and transactions with this complete auction management system.
ShootingStar - A popular work flow and time management system for eBay sellers. Manage the selling process more efficiently.
TeraPeak - A marketplace research tool. Allows you to research average prices, other sellers, current eBay trends and more from a web based interface.
ReliaBid - A service that aims to eliminate non-paying bidders, so you can receive your payments sooner.
Marketplace Research - An eBay tool designed to give both buyers and sellers an opportunity to research the latest trends in the eBay marketplace.
Supreme Auction - Downloaded software that lets you create your auction listing, add templates and submit it to eBay, right from your desktop.
Toolhaus.org - Enter any eBay user id and instantly receive a detailed report of their feedback.
Endicia - Print, pay and manage your postage and shipping right from your computer.
Zoovy - Manage your billing, inventory and shipping for your eBay business.
HammerTap - Research your products and market to make the most profitable decisions for your sales.
Vendio - Maximize your eBay sales, open a store, brand your business and make your eBay listings more effective.
Blackthorne - All-in-one application that enables you to create professional listings in bulk, manage sales, buyer communication and feedback from your desktop.
ChannelAdvisor - Tool for inventory management, ad creation, order fulfillment and more.
Auctiva - Free web based auction listing software with hundreds of listing templates and unlimited image hosting.
Listing Ticker - Tool that creates a ready-made code to copy and paste into your web pages so that you can display your current eBay auctions.
Selling Manager - eBay's online tool to assist you in managing and tracking your eBay listings. There are free and Pro versions.
ImageShack - Store your images for use in your eBay listings.
Pro Stores - Fully customizable eBay store with shopping cart integration.
eBay Sales Reports - Track your performance, measure your existing business and determine areas of improvement.
AuctionHawk - A fully integrated auction management solution. Track sales, store your images, customize your listings and more.
AuctionWizard 2000 - Software that enables you to manage your eBay listings and eBay stores at the same time.
SpoonFeeder - Complete auction management software. Store and edit your photos, build advanced auction templates and more.
EzLister - Manage your auctions, inventory and view detailed reports from this web-based management tool.
AuctionInc - A complete shipping calculator to check rates for Fed Ex, UPS and DHL. This tool can even calculate drop shipping fees.
InkFrog - Another auction management system at your disposal.
PhotoBucket - A good place to store images for use in eBay auctions.
Template -O -Matic - Free-web based auction listing creator.
HungryGopher - Manage your listings, images, sales and reports from one tool.
eBay Sidebar tool - Sidebar tool for Windows Vista. Check current auctions, receive eBay message alerts and more directly on your computer.
SquareTrade - Paid program that allows you to back all of your merchandise with a warranty. Manage your feedback rating and resolve disputes.
AuctionBlox - This tool allows you to list and manage all of your eBay auctions plus your osCommerce store so you can incorporate the two.
SitePal - Add an animated speaking salesperson to your eBay auctions.
Photoblat - Auction-ready image hosting. Place as many images per auction as you like.
List'd - Quick and easy auction listing service.
AuctionUsername - Use keywords to find unregistered eBay user names.
GoofBay - Search tool that tracks down misspelled and badly written eBay auction titles, helping you to get a good deal.
PowerSnipe - Tool that places bids on your behalf in the final seconds of an auction, leaving little time to be outbid.
BidBurglar - Win more auctions by placing bids in the last few seconds.
AuctionTamer - Multi-site auction software that allows you to research the listings before you bid.
AuctionStealer - Auction sniping tool that automatically places your bids in the closing seconds of the auction.
SilentSniper - Place your bids ten seconds before the end of the auction and beat out the competition.
TypoTracker - Find better deals by hunting down misspelled auction titles with this tool.
Auction Speller - Web based tool for tracking down misspelled auction listings to find better deals.
AuctionSniper - Out bid the competition in the last few seconds of the auction.
JBidWatcher - Manage your bids, snipe auctions and monitor your buying activity.
AuctionStealer - Another sniping tool that will automatically place your bid right at the end of the auction (not to be confused with the other tool of the same name, above). (via)