Desk.com is an online customer service software and support ticket help desk application for small business and fast-growing companies.

DeskPRO is a helpdesk software platform for service and support.

Get Satisfaction is a customer community software platform for technical support.

HappyFox is an Online help desk software and a web based support ticket system.

Helprace is a customer service software suite linking a ticket system with help desk software.

Kayako is a customer service software.

Deskero is a simple, flexible and social-aware helpdesk software and support ticket system.

Freshdesk is a cloud-based customer support software & helpdesk ticketing system that assists customers over email, phone and social channels.

GoToAssist is a cloud-based toolset for IT support teams and customer support organizations.

Help Scout is an email-based customer support platform, knowledge base tool, and an embeddable search/contact widget for customer service professionals.

Jitbit Helpdesk is a web-based help desk software it tracks support tickets, fully integrates with mailbox.

Open source support ticket system simple, free, lightweight, open source, and easy to setup and use.