Memory usage measurement

[Rashkae]

I'm trying, unsuccessfully,. to find a utility that will display the
memory allocated, not including cache and buffers.

The closes I could come is with the free command.  I can add the -/+
buffers/cache and Swap used column, which should be fairly close.
However, those numbers will contain 'clean' pages that exist both in
physical ram as well as used swap space.