Mattermost - Mattermost is an open source alternative to Slack.
Open Listings - Buy a home without a real estate agent.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Riley - A personal assistant for apartment hunting
Slack - A messaging app for teams who see through the Earth!
Peerstreet - Finances real estate through a form of crowdfunding.