phpScheduleIt is an Open Source web-based reservation and scheduling system, allowing users to register and then place reservations on any kind of resources, such as conference rooms, machines, computers, etc. The administrative side allows complete control over user permissions, resource data, reservation data, and is has many configurable settings.
OS and database independent.
Supports multiple languages. User database can be self-contained or authenticated through LDAP.
Multiple schedules are supported with unique resources.
Blackout times are easy to add and manage to restrict reservations.
Reservation minimum and maximum time limits
Mass email feature
AND Much More!