They  have over 50 of them you can take risk-free with instant access  I found it on google Enjoy!
careersaver.com / training.asp

I found another one as well-
http://www.technologycerts.com/demos

You still have to sign up to access them, but some of the courses on the list do include
312-50 Certified Ethical Hacker
CISSP - Certified Information Systems Security Professional
640-553 - CCNA Security
SY0-201 - CompTIA Security+ Second Edition
SY0-201 - CompTIA Security+ Second Edition Lab

Theres a bunch of other courses too, havent tried most of them myself yet but I signed up for these, no problems and got a coupon to buy some stuff as well