Network discovery and license tracking software?

The company I work for is looking for a network discovery software for hardware and software tracking that can also track licenses and other accounting related information. We’re public with 7 servers and 85 users/desktops. Since we are smaller, we need to keep the footprint and the cost down. We have found several packages but each has it’s drawbacks.
I’m looking for recommendations for packages that others use and like.
Recommendations anyone?
Thank you!