Interest Finder Quiz
http://www.myfuture.com/secondary/career/ch_interestquiz.html
Make career decisions based on what type of work you enjoy.

Career Assessment Tools
http://www.jobweb.org/catapult/Assess.htm
Interest and personality assessment plus career planning assistance.

About Work: Birkman Quiz
http://www.review.com/birkman
A questionnaire to help guide you to careers that would be of the most interest to you.
While you must register with name and e-mail, the test is free.