Top 3 rental open source projects

This is an Open Source Real estate management system which helps landlords to manage their rentals and properties

Availability management backend and API for Sharetribe marketplaces

Rent&Ride is an open source for Car Rental script. Travel to any of your favourite places by availing the services in the Rent & Ride application. Book cars for rental by making use of the flexibility to choose the car of your interest.