Windows only HFS (HTTP File Server) offers a super simple way to share files via the Internet. There is no install, simply an .exe file (550KB!) that provides an "easy" mode for most users and an "expert" mode that offers advanced preferences for the brave. To share files through HFS, either drag/drop the files to the HFS window, or use the Windows Explorer integration with a right-click. You can add user accounts to HFS so that you can access your own files while not at your computer, or let your friends download the latest killer track you recorded in Windows Sound Recorder.