NetHunt CRM - Turn Gmail into a smart CRM
Upcall - Upcall enables you to crowdsource your outbound calls. Collaborate with 1000+ on-demand callers worldwide for sales, marketing and customer support calls. Free trial.
Immediately - Mobile sales email and CRM management for Gmail & Salesforce
Veloxy - A sales enablement app. Your calendar on steroids!
Streak - Manage customers inside Gmail
Streak for Mobile - The CRM for Gmail