Nutshell - Small business CRM software for B2B sales teams
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
SuiteCRM - SuiteCRM, Open Source CRM for the world Fully featured Open Source CRM, as powerful as Salesforce and Dynamics. Try the online demo! Online Demo Sign up for the SuiteCRM Master Classes. First class on June 6! Download
Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.
Base CRM - Customer relationship management (CRM) & sales software geared towards making your small business, mid-market or enterprise sales team 10x more productive.
Zendesk Support - Social Customer Support and Help Desk and Ticketing