Hoteldruid is designed to manage weekly or daily rental of house apartments or hotel rooms. It uses a PostgreSQL, MySQL, or SQLite database as a backend. Reservations can be assigned to rooms automatically with user-defined rules. Pages with forms to check availability for Internet sites can be created. It supports multiple users with a privileges system. Documents and invoices can be printed, saved, and emailed.
faceCart is complete e-commerce platform. This shopping cart system was created in the patterns of oscommerce. Face Cart is extremely scalable. It is deployed on a J2EE/EJB application server. Its frontend uses AJAX to provide progress bars, real time validation, navigation, history managment, drag and drop, auto-complete boxes, and real time image rendering.
Bitcoin is a peer-to-peer electronic cash system that is completely decentralized, without the need for a central server or trusted parties. Users hold the crypto keys to their own money and transact directly with each other, with the help of a P2P network to check for double-spending.