Beepola is a windows based tracker for the ZX spectrum's beeper speaker. It can compile songs for use on hardware or emulated spectrums, render songs to .wav, or import certain types of songs from z80 or tap files.
Beepola consists of several different "beeper engines" which grant different instrument and effect abilities.
Download 1.06
*note* if you are using a previous version, it is highly recommended that you upgrade to 1.06.... it is vastly more stable ;D