Enano CMS Yubikey plugin by Enano
Enano CMS is an open source PHP-based hybrid CMS and wiki based on the MySQL and PostgreSQL databases. It is trademarked by its extensive use of AJAX, extremely slick interface, and high regard for security. Though it maintains the casual and fast-paced development traits associated with small projects, Enano also has the quick response and solid support you would expect from a large CMS package.
Support for Yubikey is available in Enano CMS via a plugin. Enano's Yubikey plugin allows changing the authentication server, assigning what information is required during a logon, enrolling multiple keys in one account, and full support for Yubico security features such as signatures - one of only two known CMS plugins that do this. Since Enano's password system is built on the same HMAC-SHA1 algorithm as the Yubikey API, the user gets a very responsive, very friendly interface unbeaten by any other authentication plugin.
You may view a demo installation of Enano 1.2 with Yubikey support at yubikey.demo.enanocms.org. (A Yubikey is required for registration.)
The contact person for this contest entry is Dan Fuhry, reachable here.