Vtiger One - Customer Relationship Management Software
Cloze - Smarter Relationship Management
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Accompany - Accompany platform integrates with email, contacts, social feeds and more to keep you informed on your professional connections.
Salesforce - CRM software solutions and enterprise cloud computing from salesforce.com, the leader in CRM and platform as a service.
Propeller CRM - Small business CRM with deep Gmail integration