If you’ve been following the development of PHP 5.5 you probably already know that the Zend Optimizer Plus has been released under the “The PHP License, version 3.01” license, renamed to Zend Opcache, and merged into the PHP 5.5 code base. Last week PHP 5.5.0 beta-1 was released, which is the first version to include the Zend Opcache.
CK has built a simple Zend Opcache control panel, which you may find useful. The code is available at https://gist.github.com/ck-on/4959032/?ocp.php.