SupportYourApp - Connecting talented people with the blooming IT industry to help them grow faster by outsourcing support.
79ecommerce - 79ecommerce provides eCommerce customer support services.
nService - Web based help desk software that helps you help your employees and customers. Easy to use. Customizable. Free trial.
Service - Customer service issues solved for you, on demand, for free.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
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