What about ServiceNow??
The list is a bit short - there are a number of other good solutions out there. ServiceNow is rapidly eroding market share because it is a simple to use platform (that can do far beyond simple help desk) that is delivered securely in the cloud, and is easily configurable to meet business requirements. Additionally - and perhaps most importantly - its functionality is 100% organic in that it has evolved without 'buying' 3rd party solutions to enable functionality
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