SalesforceIQ - SalesforceIQ is one of the most popular and well featured customer relationship management platforms around.
Perfex CRM - Perfex CRM is an online self-hosted customer relationships management platform that allows you to grow your business with robust integration services.
Salesforce Sales Cloud - Cloud-based CRM & Sales Automation
APRO CRM - Customer relationship management for real estate
Sidekick by Hubspot - Customer insight integrated with your email tools.
Concord CRM - Concord is self hosted CRM application focused on closing deals faster, manage contacts and companies and has dead simple and affordable pricing.