Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
WHMCS - WHMCS is an all-in-one client management, billing & support system for online businesses.
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
HostBill - HostBill is a powerful and flexible, all-in-one automation, billing, client management and support platform for online businesses.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Blesta - Blesta is professional client management, billing, and support software.