Cypod sends his simple but handy adjustable tremolo plug-in, which he’s made available free:

Tremolo Audio Unit [Cypod blog]

But that’s only half of the reason this is cool. He used the SuperColliderAU tool, which allows sonic effects built in the free, open-source audio coding language SuperCollder to become standard AU plug-ins. (He demonstrates it in Ableton Live.) Good stuff. So, is there an equivalent for Windows VST or even Linux LADSPA, with SuperCollider?