Datenator is Open source calendar system, written in PHP. It allows users to add and view events.
Administration panel allows admin to edit, delete and modify general calendar settings and events easily.
A multi-featured, highly configurable, Web-based rental property management system designed for small- and medium-scale tourism enterprises (e. g. hotels, campsites, all kinds of hostels). Its important features include a tabular view of the occupied rooms, a detailed customer and booking file, a customer search function, internal email sending, a small organizer, and printing of bills and address labels. It also provides user-based session management. Users are members of predefined groups which provide a simple access restriction mechanism.
A really simple content management system (CMS) framework for bands, public speakers, performers, entertainers, or anyone else who needs to maintain a performance calendar online.
WebCalendar is a PHP-based calendar application that can be configured as a single-user calendar, a multi-user calendar for groups of users, or as an event calendar viewable by visitors.