"OMG created OCUP to provide a certification, an objective indication, of your knowledge of UML, OMG's Unified Modeling Language.

There are three levels of Drupal Certification:

Sun Certified Java Programmer (SCJP)

Related Courses:

Java Fundamentals

Linux Professional Institute Certification (LPIC)

Certification description can be found at http://www.lpi.org

Zend Certified Engineer (ZCE)

Related Courses 

Developing Websites with PHP