WebCalendar is a Web-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.
WebCalendar requires a database such as MySQL,
Oracle, PostgreSQL, MS SQL Server, ODBC, or
Interbase. Features include email reminders,
iCal/vCal import/export, remote subscriptions for
Sunbird or Apple iCal, LDAP and NIS support, and
translations for 29 languages.