Originally Posted by RoseHosting.com
Cerberus helpdesk is a good choice and has knowledgebase functionality as well as a bunch of other cool features.
People still use Cerberus? I find it to be incredibly outdated as far as looks and functionality goes.
Used Kayako for a while, got tired of Varun's lack of management, slow progress in features , etc..
For now, WHMCS is where it's at. It's far from the best out there, and still needs a good bit of help, but it works.