Extending the Task Manager
Most of us are quite familiar with the Task Manager application that helps us to monitor the memory and CPU usage of the programs besides checking the applications to bringing into control from running amuck. There are few things that are dreamt by heavy users like File Handles, Process Handles etc. The default Task Manager does not give such a granular control.
Taking it still further and deeper, there is one article/code from CodeProject, which integrates a plugin into Windows TaskManager. I found this to be very handy and without need of launching another application. Check out TaskManager extension from here. You can download both source and binaries from CodeProject after registering over there.