Reserve is the D8 port of Room Reservations. Whereas that module was specifically for reservations for Rooms (it included a node bundle called “Rooms”), Reserve intends to allow booking of any fieldable Content Type (node, user, term, etc). Rather than provide a room bundle, it has a custom field (Reserve Category) which can be added to any bundle to allow it to be reservable. It also provides a booking calendar for each reservable bundle. Examples: rooms, cameras, tutors.