In 1990 I started composing on the Commodore 64 home computer, since then I've made over 350 tunes spread across some 30 music-collections.
You can download those collections on this page.
To run them you either need The Star Commander to transfer the files to your C-64, or use a C-64 emulator like VICE or CCS64.
You can also browse my directory in High Voltage SID Collection (HVSC).
To play .sid files you need either SIDplay for Windows or SIDplay for Mac.
Another site to check out is Stone Oakvalley's Authentic SID Collection where you can find every tune from HVSC in MP3 format.