Development versions of GnuPG Note that GnuPG 1.9.x is quite different from the older versions and under heavy development. The S/MIME part (i.e. gpgsm and gpg-agent) are however pretty stable and useful. For OpenPGP use, Please use gnupg 1.4.x available in the standard directory above. Note, that we put release candidates of 1.4.x into this directory here too.