libmicrohttpd is released under both the LGPL Version 2.1 or higher and the GNU GPL with eCos extension. For details on both licenses please read the respective appendix in the manual.
GNU libmicrohttpd was originally designed by Christian Grothoff <christian@grothoff.org> and Chris GauthierDickey <chrisg@cs.du.edu>. The original implementation was done by Daniel Pittman <depittman@gmail.com> and Christian Grothoff. SSL/TLS support was added by Sagie Amir using code from GnuTLS. See the AUTHORS file in the distribution for a more detailed list of contributors.