Download of ZEsarUX_bin-4.2-debian8_x32.tar.gz (ZEsarUX_bin-4.2-debian8_x32.tar.gz ( external link: SF.net): 38,339,040 bytes) will begin shortly. If not so, click link on the left.
It's a ZX Machines Emulator for Unix, including:
-ZX80
-ZX81
-ZX Spectrum
This is my second spectrum emulator after ZXSpectr
http://sourceforge.net/projects/zxspectr/