Authors of libsnprintfv.  See individual files for their licenses.

Gary V. Vaughan <gary@gnu.org>:
  Designed, implemented and maintained libsnprintfv up to the 0.98h release.

Paolo Bonzini <bonzini@gnu.org> and
Bruce Korb <bkorb@gnu.org>:
  Are currently maintaining libsnprintfv (starting from Summer 2002).