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.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

Qelp - With over 70 clients worldwide we are responsible for the online support experience of over 400 million end-users. We help customers outsmart technology.

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

79ecommerce - 79ecommerce provides eCommerce customer support services.