libfprint
http://www.reactivated.net/fprint

libfprint is primarily licensed under the GNU LGPL. HOWEVER, THIS PRERELEASE
VERSION INCLUDES GPL CODE FROM LIBTHINKFINGER, therefore distribution is
subject to both the terms of the LGPL (see COPYING) *and* the GPL
(see COPYING.GPL).

At release time, I will contact libthinkfinger authors and see if they will
be happy to relicense. I expect they will.