My little 800Mhz Pentium III, with 256MB of RAM has reached new heights in proving old computers are still useful.
Thanks to Linux, this little work horse of mine is now router, file server, media (video and music) server, print server, and scanner server.
Gotta love that OS. It still manages to surprise me as to what is can do with so little hardware.
Had to move the printer to it as it is no longer supported in Windows 7, and later OS's from Microsoft. Same for the scanner. First time I can recall Linux providing hardware support for something that Microsoft does not.