Playing Sinclair Spectrum Games
  X128 Said to have the most accurate Spectrum emulation. It's a DOS application, but works well under Windows too. There are also ports for other operating systems in the works.
  RealSpectrum A good, freeware Spectrum emulator for DOS. Should run fine under Windows too, and sometime during 2001 it should also be available as a pure Windows application.
  ZXSP A Spectrum emulator for PowerMac with MacOS or Linux with X11. Based on MacSpectacle, which is also available from the same site.
  XZX A nice Spectrum emulator for Unix machines with the X Window system. The emulator is shareware, but the demo version covers all the basic needs. Registration fee certainly isn't a fortune (USD 25 or EUR 25), and there are many ways to pay it.