LibreBooking

Booked is an open source reservation and scheduling application. Initially released in 2003 (then known as phpScheduleIt), Booked has been downloaded over 200,000 times.

Booked allows 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.

Features:

• Simple schedule view allows users to quickly find and book an available time slot.
• Easy to use administrative tools allow you to search, manage and export data quickly.
• Organize users and limit access by groups.
• Flexible layout configuration lets you set up schedules that fit your needs.
• Limit and control resource usage with a flexible quota system.
• Optionally review and approve reservation requests.
• Export reservation details to Outlook or any other system that accepts .ical files.
• Authentication integration with LDAP/Active Directory.