Lots of these (including this one) come out of universities, or university-corporate research partnerships. Personally I'm very glad that universities nowadays seem to be more okay with publishing tangible results (i.e. source code) as opposed to "just" the research papers. I don't think it's always been that way. I can't begin to imagine the amount of work that is rotting on someone's old usb stick, because they weren't allowed to publish their PhD theses's source code.