Perfect Channel Auction - Auction
Silent Auction Pro - Simple * Affordable * Powerful --- Silent Auction Pro is a multi-user, internet-based fundraising software system providing complete donor and auction management solution for charitable organizations.
Qtego - Qtego offers silent auction bidding technology for fundraising events.
SchoolAuction.net - SchoolAuction.net is a web-based software to help school auction teams plan, manage and run school fundraising auctions.
BiddingOwl.com - BiddingOwl.com provides non-profits with auction management tools and helps to acheive fundraising goals.
Webid - WeBid is an open-source script to get an auction site up and away.