Top Producer - Real estate crm software.
Onesheet CRM - The Simple CRM for Google Sheets
Realty Pilot - Realty Pilot is a suite of paperless real estate software.
Followup.cc - FollowUp for email is a lightweight productivity suite that keeps your conversations and tasks from slipping through the cracks. Set perfectly timed reminders that arrive at the top of your inbox, right when you need them.
Close - A CRM with built-in calling, SMS, and email
Freshsales CRM - A full-fledged CRM for high-velocity sales teams.