The below customer support tools can be installed with a click of the mouse.

Customer Support:
Crafty Syntax Live Help (2.7) (visit site)
Help Center Live (1.1) (visit site)
osTicket (1.2.5) (visit site)
PHP Support Tickets (1.7) (visit site)
Support Logic Helpdesk (1.1) (visit site)
Support Services Manager (1.0b) (visit site)