Everyone has heard of free software. How about free hardware?
Check out Ronja.
Ronja is a free technology project of reliable optical data link with current range 1.4km and current communication speed 10Mbps full duplex.
GPL licensed hardware designs. Awesome.
Why yes, I have heard of free (as in speech) hardware:
http://kerneltrap.org/node/5743
Wow, I haven’t heard anything about that project for so long I figured it was dead. Thanks.