Evercontact - Your contacts always up to date and automatically with Evercontact.
Immediately - Mobile sales email and CRM management for Gmail & Salesforce
Pobuca Connect - Connect with your contacts.
NetHunt CRM - Turn Gmail into a smart CRM
CRM-gx - Contact Management
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.