ZX Spectrum
Amiga Spectrum Utilities, ASp, ASpectrum, BeZX, DreamSPEC, DSP, E++, EmuZWin, Ergon's ZX Spectrum Emulators, FBZX
ZX81
NO$ZX81, T/S 1000 Emulation in a Browser Window, VB81, XTender, Z80Stealth, z81, ZX81 Emulator for the PalmPilot
Sinclair Emulators Home Page
This is the home page for Paul Robson's Sinclair Emulators. There are two of these - a ZX80/81 emulator and a Spectrum Emulator. All are freeware, and the source code is available for those interested.
The wild and wacky world of the Science of Cambrid
Offers an emulator of the MK14 for download.