ZenDesk

Zendesk, inc. is a software development company based in San Francisco, California. The company provides a cloud-based Customer Service (User Support) platform, also called Zendesk, that includes ticketing (Issue Tracker), self-service options, and customer support features. Founded in 2007, the company now employs roughly 500 people[1] and serves more than 40,000 customers[2] in 140 countries. http://en.wikipedia.org/wiki/Zendesk

http://www.zendesk.com/