A ZX Spectrum emulator with network play capabilities. See plus-f.socialthingy.com for details on how to use.
The Emulator package contains an image of the 48k ZX Spectrum ROM, which is required in order for the Emulator to operate. This ROM remains copyright of Amstrad, and Amstrad have kindly given their permission for the redistribution of their copyrighted material but retain that copyright. (Full details here.)