Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.

ProLease - ProLease helps organizations manage their leased, owned and subleased properties in one integrated system.

Flarum - Flarum is the next-generation forum software that makes online discussion fun. It's simple, fast, and free.

Yardi Voyager - Voyager is software for managing properties and the people who live there. The software is developed by Yardi, a company founded in 1984 that specializes in property management software. Read more about Yardi Voyager.

Simple Machines Forum - Simple Machines offers free open source software such as SMF, the powerful and easy to use community forum written in PHP. Start interesting discussions on your website!

DotLoop - Peoplework, Not paperwork.