CSE have an alternative to Ranger and CC3/4 called Network Toolkit - it's got all the tools the RM one has and more (e.g. it's got an asset booking thing, a networked presentation screen package built in, and it works within the Active Directory as opposed to locking it all down like the RM one.
It's basically like having a company sort out your active directory and support your network without taking over.
As you'd expect it comes with software assurance, upgrades/updates and the first year's support and maintenance is free.
