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.
ZaK is a property management system for hotel and bed-and-breakfast hosts. It's a Web application, consisting of a server and an HTML UI. ZaK offers basic features like reservation invoices, tableau, and customer database handling. It's possible to connect ZaK, natively, with an online booking engine and with a channel manager to manage online travel agencies, such as Expedia and booking.com.