I agree with the others Cerberus is a very nice, however your requirements are pretty out there for a free solution as AvailNetworks has stated, support desks are very very important to you, your customers and will have effect on your overall happiness from your clients.
GS RichCopy 360 Enterprise - Voted #1 for data migration and replication in terms of performance and features. Replicate data across between servers in the same network, WAS, or even across the internet
Also take a look @ the free version of Auracle Support Engine.
One beauty about Auracle & Cerberus, is that if you're company doesn't need the extras (like more ques, etra personell, etc), then these are very good to use, and once you grow beyond these "limits" you can upgrade very easily!
Of Cerebus and AuracleLite, I much prefer the look of Auracle Lite 'out of the box'. We're evaluating the paid version now.
We're moving away from the free solutions but we have been using Cerebus. We had to do a lot of tweaking to get it to fit with the look of our site which can make upgrading a bit of a chore. Functionally though, Cerebus totally rocks. If you like its native look-and-feel I highly recommend it.
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Its same, they changed the name and made it open source project.
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