json-c is a JSON library for C. It is a prerequisite for PulseAudio, support for which is included in my upcoming sox ITP. Straight-forward, no additional deps, already in Fedora:
ftp://ftp.cygwinports.org/pub/cygwinports/release-2/json-c/ I was going to put other packages here, but they may require further discussion, so I'll leave those for another thread. Yaakov