Opsound

Opsound aggregated links to music hosted on other servers, as well as provided discussion forums and organized real-world events and concerts.

Opsound was a social art project by Sal Randolph, who created the site to provide a space for open, uncurated collaboration between musicians and sound artists.

It was described on the site as "a gift economy in action, an experiment in applying the model of free software to music."

Lawrence Lessig often mentioned Opsound when discussing Creative Commons, citing its structure and licensing as a positive aid to enhanced collaboration and communication between artists.

There were plans to add software for so-called "microlabels" to allow people to create their own albums from the sound pool.