This tutorial shows how you can set up an OpenSUSE 10.3 desktop that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge.
I want to say first that this is not the only way of setting up such a system. There are many ways of achieving this goal but this is the way I take. I do not issue any guarantee that this will work for you!
Falko lists all of the software he needs for his desktop to be considered Windows replacement worthy. It's a long list, so I won't reprint it here. I'll simply mention that it's quite comprehensive. Also, he goes through a step-by-step tutorial which will get your new system completely installed. The result? it looks pretty darned good.
Related links, if you're so inclined: