This is just bloody awesome, and I love the physical seed library they have made: http://www.connectedseeds.org/visit
“The Connected Seeds Library lives at Spitalfields City Farm in east London. A seed library works a bit like a regular book lending library. In order to borrow seeds from the library you will need to become a member. Members can take seeds home to grow, and are encouraged to return some of the seeds to the library at the end of the season, in order to maintain the stock of available seeds.”
Ooh, there’s a book you can download: http://www.connectedseeds.org/wp-content/uploads/2017/02/Connected-Seeds-Book_Low-res.pdf
Sunbeam City is a Libertarian Socialist solarpunk instance. It is ran democratically by a cooperative of like-minded individuals.