TestTrack License Usage Monitor
From Seapine Labs
Works with TestTrack 2008 and later
The newer, and more robust License Usage Dashboard will give you better metrics.
If you're looking for more insight into your usage of TestTrack licenses, this tool provides a great start.
The app monitors your usage of TestTrack Pro and TCM licenses, across all three types (named, floating & SDK).
 In Action
It's written in C#, .Net 2.0 and tested against TestTrack 2008.1.
Note: Seapine does not provide support for sample applications.