MapPlug - Manage your facility information easily on your floor plans with MapPlug
MakePlans - Online appointment booking - MakePlans
Anabode - Anabode is a smart property management platform for landlords & property managers of all sizes. Manage, Repair & Keep Track of your properties, anywhere in the world. Get started for free. No credit card required.
Appointment Booking Calendar - With the Appointment Booking Calendar you can accept online bookings from a set of available time-slots in the calendar.
Cozy.co - Modern property management for landlords, property managers, and renters.
Dudle - Dudle is an online scheduling application, which is free and open source.