HelpScout - Help Scout is a simple, straightforward way to provide excellent support
AirHelp - Get paid when you're delayed!
HelpNinja - Simple & Affordable help desk
Service - Customer service issues solved for you, on demand, for free.
SupportYourApp - Connecting talented people with the blooming IT industry to help them grow faster by outsourcing support.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.