privacyIDEA is a management and authentication system for two factor authentication. You can use OTP tokens, OTP cards, SMS, Smartphone Apps to incorparte the second factor. It can even manage SSH keys and supports Offline OTP. The latest version can manage and enroll user certificates.
Its modular design makes it easily enhancable. It runs on Linux.
Applications and workflows can be connected to privacyIDEA hence enabling two factor authentication in your system logon, web...
Naraio is LAMP like software. It contains Apache, MySQL, PHP, Perl, Openssl, Phpmyadmin, OpenLDAP, Subversion, Ruby, Python, Phpldapadmin, and Trac. Trac and Subversion are authenticates user with integrated ldap. Naraio is easy, secure and flexible.
UnityCA is a Certificate Authority "front end" based on the Community-Oriented CA (COCA) model, which was primarily developed for non-profit "free CAs." Organizational and end-user interfaces provide trusted web management of the installed CA (eg ElyCA).