A screenshot of the software included with the Commodore SFX FM Sound Expander, which turns the Commodore's keyboard - or an optional full-size external piano-style keyboard - into a synth. Musical staves are visible in the background, while a yellow "Synth Voices" menu provides a list of sounds to pick.

A screenshot of Simons' BASIC, a cartridge-based expansion to Commodore BASIC 2.0 which adds 114 new commands. A short program to plot a sine wave in high-resolution mode is visible.

The output of a Simons' BASIC program to plot a sine wave, showing a dotted line tracing the wave on a white background with a blue border.

The title screen of Mayhem in Monsterland, an impressively high-speed platformer released relatively late in the original Commodore 64's commercial run.