Mezzano: Operating system written in Common Lisp
Some starting points:<p>USB mass storage driver: <a href="https://github.com/froggey/Mezzano/blob/master/drivers/usb/mass-storage.lisp" rel="nofollow">https://github.com/froggey/Mezzano/blob/master/drivers/usb/m...</a><p>ext4 file system (read-only): <a href="https://github.com/froggey/Mezzano/blob/master/file/ext4.lisp" rel="nofollow">https://github.com/froggey/Mezzano/blob/master/file/ext4.lis...</a><p>TCP network stack: <a href="https://github.com/froggey/Mezzano/blob/master/net/tcp.lisp" rel="nofollow">https://github.com/froggey/Mezzano/blob/master/net/tcp.lisp</a>