HubSpot CRM - Free CRM software for small businesses.
Cloze - Smarter Relationship Management
Keap - Grow Sales. Save Time. Get Organized.
Accompany - Accompany platform integrates with email, contacts, social feeds and more to keep you informed on your professional connections.
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.
SuiteFlow - SuiteFlow is a product to customer management solution offering a host of tools to manage inventory, contacts, invoices etc.