Got a Linux box in the house and want just a few applications from over there (Linux) to run over here (Windows)?

The X windows system -- the base which allows graphical applications to run in Linux -- has always had the ability for an application to run on one machine while displaying on another. That's a basic concept of X's design, and with Xming running on your Windows machine, now you can export those X applications to your XP/2003/Vista desktop.

The downside is you'll need a running Linux box (either separate or as a virtual machine) to host the application you want to export. However, if you're already spending time at more than one machine, this could be a serious productivity tool for your arsenal.

SourceForge.net: Xming X Server for Windows

This is a pretty slick application... it works just like "ssh -X" in Linux. For those who don't know what that is, in Linux you can run a program on one computer but have the actual window drawn on another computer. So this doesn't let you run the program on the Windows box, it just lets you see and control the window, sort of like a per-program remote desktop.