JASA allows researchers in agent-based computational economics to write high-performance trading simulations using a number of different auction protocols. The software also provides base classes for implementing simple adaptive trading agents.
BidNobble is a Java based eBay auction tool. You can track eBay auctions and the snipe tool allows you to schedule your bid to be placed seconds before the auction ends. IMPORTANT: download and support on the homepage, the downloads here are out of date!
Auction Mage is a sniper software to manage and bid on your online auctions. It has many features: multi-language, bid now, bidding groups, timesync, $ and euro support, RAS connect, browser control (server mode), ...
DealerSys is a flexible retail e-commerce system for businesses which do not
fit mainstream e-commerce systems. It handles items sold by length, area or volume, unique items, and auction items.
auctionANT is an auction management tool.
It uses endofauction mails to generate a customer db and
send automatic payment instructions.
It also manages incoming money, ...
It is written in Java so it is platform independent.
Windows, Linux, Solaris
Auctioner is an eBay-stylish auction software. It is intended as an example for the book "Portale und Webapplikationen mit Apache Frameworks" ed. Fabian Theis, but it may serve as a starting point for further development as well.
Unlimited organizations, 3 enterprise SSO connections, role-based access control, and pro MFA included. Dev and prod tenants out of the box.
Auth0's B2B Essentials plan gives you everything you need to ship secure multi-tenant apps. Unlimited orgs, enterprise SSO, RBAC, audit log streaming, and higher auth and API limits included. Add on M2M tokens, enterprise MFA, or additional SSO connections as you scale.
Gavel is a Web application for hosting charity auctions online. It was orginally developed for use by a public broadcasting station and is being refactored for general use.
This features a text based, interactive auction manager programmed in Java. I think it is not full functional for a "real" use, but may serve as a basis to anyone who wishes to implement his/her own auction system.