EightyOne is emulator for several home computers made by Sinclair Research (And their clones) in the 1980s. EightyOne currently emulates:

Sinclair ZX80 Timex TS1000
Sinclair ZX81 Timex TS1500
Sinclair ZX Spectrum 16k/48k Timex TS2068
Sinclair ZX Spectrum 128k Timex TC2048
Amstrad/Sinclair Spectrum +2 Lambda 8300
Amstrad/Sinclair Spectrum +2a Ringo R470
Amstrad/Sinclair Spectrum +3 MicroDigital TK85
Jupiter ACE

Here's whatsnew:
Updated libdsk and lib765 to latest versions. Removed really nasty hack to support
Aszmic ROM and replaced it with a more devious hack.

Get it here:
http://www.chuntey.com/eightyone/

-Trebor