So which projects actually use GnuTLS as opposed to OpenSSL (Apache, lighttpd, nginx) or NSS (Firefox, Chrome)? I'm aware of Debian linking some packages against GnuTLS to avoid the supposed GPL incompatibility issue with OpenSSL, but the only thing I've seen that explicitly uses GnuTLS is Emacs 24.
Back when I still used Apache it didn't have support for TLS 1.1/1.2 due to the dep on OpenSSL and thus none of the better FS ciphers. So compiling against gnuTLS allowed for those. That's now been rectified.
