HelpScout - Help Scout is a simple, straightforward way to provide excellent support
SupportYourApp - Connecting talented people with the blooming IT industry to help them grow faster by outsourcing support.
HelpNinja - Simple & Affordable help desk
Zervicio - Customer Support Services
Intellihelper - Automated customer support 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