I run a twin monitor (dual-head graphics card) system both at home and at my office. One card is a high spec Nvidia card, and the other PNY. The Nvidia has some nice application integrated tools for switching apps to the alternate montior, the PNY card has none.
Having found this neat, and free, tool, I'm now test driving it on both systems. The tool gives me a task bar on both monitors, and minimises apps to the appropriate monitor taskbar. It has a tidy little option that adds a small icon to an apps title bar allowing you to "throw" the app to the other monitor.