BPB 64 is a freeware virtual instrument by Bedroom Producers Blog. It uses multi-samples to recreate the sound of the Commodore 64 home computer.
BPB 64 includes 30 presets, covering bass sounds, pads, leads, and the inevitable fast-paced arpeggios that make the SID chip so legendary. All sounds were captured raw, directly from the SID chip, so you're getting the same infamous grit and lo-fi crunch that you'd get if you hooked up a C64 directly to your audio interface.
Enter $0 as the price to download for free.