Issuetrak - Issue tracking software for help desk and customer service
Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
AzureDesk - Azuredesk.co is an online customer service software and support ticket help desk application for small business and fast-growing companies. Get a free trial today!
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
Vision Helpdesk - Help Desk Software, Multi-Company Help Desk, ITSM Service Desk & Live Chat Software
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.