Where can I download more games and other programs for ZX Spectrum emulators such as Spectaculator?

World of Spectrum and the TZX Vault keep an extensive archive of Sinclair ZX Spectrum software (currently about 11,000 titles).

It is important to remember that nearly all ZX Spectrum games are still under copyright.

There is an excellent article here on the World of Spectrum website regarding common misconceptions on distributing vintage computer games.