Impact Suite gives act! the ability to support multiple monitors. You can detach any view and slide it over to your second or even third monitor.
Any view can be detached by following these steps:
In act! go to the TOOLS menu and select IMPACT
Click on the MODULES tab
Place a check mark in the Multi-Column option
Click on the OK button
The next time you move to that view a message will come forward informative you it has been places in its own form. This form can now be slid to any monitor.
Below is a screen shot of three monitors displaying four different views.