Salsa Labs Nonprofit Marketing - Salsa is a fundraising, advocacy, and marketing software platform for nonprofit organizations.
Handbid - Generate more revenue and delight your bidders with the Handbid mobile bidding silent auction software with apps for iOS, Android, and the web.
Auction Harmony - Auction Harmony offers auction technology to help nonprofits reach their fundraising goals.
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.
AngelList - Access top deals through investor-led syndicates
E-Multitech Auction - E-Multitech Auction is a web and ecommerce solution that makes different kinds of auctions such as Ebay style auctions, price reveal actions, & penny auctions.