I use the late Dave Ransom's STS Orbit Plus to track the shuttle (when it's up there) and ISS. There are still a few Amateur Radio sites that carry the code for download, but it runs under DOS (or DOSEMU under Linux). As well as doing the NASA world daylight map thing, it will show you an orthographic projection of the globe with tracks and visible footprints. If you have radio gear, it shows you the Doppler shifts so that you can have a listen, as well as showing pass predictions. If you pick up the Two-line elements for other satellites it will track those for you too (Hubble etc).