The CSL ("Cooperative Software License," "Communist Software License") is a Copyfarleft license that can be used for software and other cultural works. It follows along the lines of the Peer Production License, but with added stipulations on software's redistribution.
TL;DR, it's copyleft, but with one added restriction: You cannot sell the licensed work as a "traditional company" (anything other than a non-worker-owned cooperative). You can only commercially redistribute licensed works as an individual or as a worker-owned cooperative.
It's a commie license <3
2018-02-25: Updated version with clause 4(e.iii) added.
2019-05-07: Updated version with some typos fixed (thanks, lynnesbian!).
lynnesbian's made a really nice site on the CSL.