ActivDesk
ActivDesk SQL is a feature rich web based help/support desk system. In todays information age, your customers deserve and demand great customer support. ActivDesk has been designed for this from start to finish, no matter how demanding the task. Manage support requests & questions from customers with ease in an organized and professional manner. ActivDesk also eliminates any spam related problems when dealing with customers or potential customers. It comes with fully customizable customer control panels, admin panel, support staff access levels, knowledge base functionality and many more.

version: 2.0   os: Unix/Linux based web host   price: 9   requirements: MySQL
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