HelpScout - Help Scout is a simple, straightforward way to provide excellent support
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
HelpDesk - HelpDesk is a powerful and affordable ticketing system and help desk software for effortless customer support. Get started for free, no credit card required.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
ProProfs Help Desk - Help Desk software by ProProfs to help support agents track, prioritize & resolve customer support tickets. ProProfs Helpdesk makes you more productive.