Assessment on a hand-held computer
http://wgen.net

Leveling books
www.titlewave.com

Accelerated Reader website - there are some sample quizzes you can try.
http://www.renlearn.com/ar/
When you search on the web under Accelerated Reader you will get book lists from different schools that have identified book levels in their school and posted the information on the web. 

Variety of Graphic Organizers that can be use with different types of text.
http://www.eduplace.com/graphicorganizer/index.html