Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
Request Tracker - open-source enterprise grade issue and ticket tracking system
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
NetHelpDesk - Leading provider of help desk software and customer support software. Trusted by IT professionals and service desks for over 20 years.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Juntrax - PSA solution for streamlining operational processes