Communifire - Enterprise Social Collaboration Software
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
DigitalChalk - Online Training Software and Learning Management System (LMS)
UseResponse - Open-source, self-hosted customer feedback software, live chat and helpdesk system that you can install on your server. Organize documentation using knowledge base and get feedback from social networks with centralized system
Workplace by Facebook - Connect everyone in your company and turn ideas into action.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.