TargetProcess - Agile Project Management Web Application
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Plan.io - Planio makes web based project management and team collaboration more efficient and fun. It is the perfect platform for your projects, team members and clients.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Interakt.co - Convert customer engagement into revenue.
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