Roof - Delightful home sharing for roommates and their landlords.

EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

Rentberry - Rentberry facilitates the long-term rental process for both tenants and landlords. We help tenants save time on rentals and landlords get true market values for their rental properties.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

HeyLandlord - Simplifying communication between landlords and tenants

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.