Is this preceding work to the tour de force that is the Chez Scheme incremental like 40+ Scheme compiler. I mean, Cisco bought it, probably to hide it from us all. It must be worth something.
As someone pointed out, yeah, open-sourced after bought. There used to be variations. One, compiled, Chez Scheme, and the latter interpreted with none of the benefits of the compiler design but still fast and well desiged in relation to other Schemes, Petite Chez Scheme. The latter was freeware, the former, neither free/open nor freeware.
It was never clear why Cisco bought it. Rumors persist ...
https://www.youtube.com/watch?v=Os7FE3J-U5Q
http://lambda-the-ultimate.org/node/1589
https://github.com/akeep/nanopass-framework