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Re:T-shirts are currency by hkmurakami on Thursday February 07, 2013 @06:47PM (#5185284)
Yup, my friend's company gives t-shirt priority to people who've contributed to their open source project :)
Re:T-shirts are currency by lambada on Thursday February 07, 2013 @08:07PM (#5185646)
While Tor will send a T-Shirt to anyone who runs a Tor Relay for a couple of months (and meets some basic bandwidth requirements).

https://www.torproject.org/getinvolved/tshirt.html