Apps similar to Classroombookings include Booked Scheduler. It's paid, but LibreBooking is free. Other options are Freeperiod and BookEm.click. In total there are four School Management Systems like Classroombookings for the web and self-hosting.
Booked (formerly phpScheduleIt) is a simple but powerful reserve-anything scheduler. With flexible layouts, custom rules, a powerful administrative backend, and an unbelievably simple user experience, Booked can fit almost any need.
An online room booking system for schools and colleges that can be used to track ICT usage and easily manage the sharing of ICT resources
LibreBooking is an open-source resource scheduling solution. It provides a flexible, mobile-friendly, and extensible interface for organizations to manage resource reservations. The "develop" branch contains the latest code of the project.
