A spec compliant, secure by default
One Time Password Authentication package, compatible with Google Auth
FIDO® Certified StrongKey FIDO Server (SKFS)
nuBuilder Forte is a cloud database builder.
PHP strong authentication library, web interface & CLI, OATH certified
apache cookie SSO mechanism.
Two-factor authentication system
phpbb Multiple domain Single Sign on with wordpress plugin
Deprecated project - see http://wordpress.org/extend/plugins/wpmuldap/