FollowUp is a personal CRM that makes managing your professional relationships easy. Set followups, write notes, schedule reminders, create events, and more without ever leaving your inbox.
NetHunt CRM is service to turn your Gmail inbox into a full-featured CRM system.
It helps you organize your business processes into the easy-to-manage and analyze Records available from Gmail. This allows you to manage and supervise sales, clients, project, support cases and other business activities within the familiar Google Apps ecosystem.
Friendly Reminder is a seriously simple personal CRM. Friendly Reminder will email you reminders to get back in touch with the friends you tend to loose touch with. Each reminder includes any comments from your last interaction and whether your friend's birthday is coming up. Technology shouldn't dilute our friendships but enhance them!