The startup
provides a Cloud based Helpdesk and is used by several organizations globally.
It’s a Pay As you go service which means you don’t have to invest in any new
hardware,software or other services. The First three Users are Free for you. I
would allow you to explore the other interesting options on the site.
You can visit http://www.freshdesk.com/.
You can setup a free account on this site itself through the Get Started button
on the Homepage. You could also create a
Custom domain for e.g. mycompany.freshdesk.com which
could then be used by employees of "mycompany" globally.