Customer Support Automation Tool - A team member who will handle your mobile support routine
Onesheet CRM - The Simple CRM for Google Sheets
Directly - Directly provides on-demand customer service apps.
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.
AppFollow - AppFollow is an integrated solution that makes monitoring, analyzing, and elevating your app's reputation easy.
Freshsales CRM - A full-fledged CRM for high-velocity sales teams.