VuFind - VuFind is a library resource portal designed and developed for libraries by libraries.
Backflip - Selling your electronics just got easy
Blacklight - Blacklight is a free and open source ruby-on-rails based discovery interface (a.k.a.
Whatnot - The safest place to buy & sell collectibles
Taker - Take your restaurant online
Experify - Connecting you to owners of products for honest opinions.