PekWM offers an additional solution: window grouping. It allows a variety of different applications to be grouped together in a single window. Most everyone is familiar with tabbed browsing by now. The same concept has been applied to terminal emulators with different command line sessions accessible via tabs. Window grouping takes this one step further. When window grouping is used in PekWM the title bar in the window manager is segmented with each section effectively acting like a tab.

While PekWM isn't the only manager to offer this functionality it is probably the easiest and most flexible choice I've found so far. PWM was actually the first tabbed window manager but it hasn't been maintained since 2000. It's sucessor Ion, would probably be popular if its license didn't effectively preclude it being packaged for various Linux distributions. Fluxbox, a somewhat more sophisticated window manager also supports grouping/tabbing.

Read More: http://broadcast.oreilly.com/2009/03/improved-linux-screen-space-ma.html