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
HelpSite - HelpSite is a simple service to help your setup the perfect support centre or help site.
Zoho Desk - Industry's first context-aware Helpdesk Software
Support Hero - Educate your customers through self-help support
Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.
Apervita - Apervita is a self-service platform that allows health enterprises and professionals to author evidence-based insight and connect it to practice, anywhere.