Gnowledge is a new (beta) free site designed for creating and taking tests/exercises. This is a wonderful web 2.0 site that is very innovative and very beneficial to educators and students. Once a test is published it can be shared w/ others and the results are available as well. Tracking progress is key when trying to measure growth and knowledge in a subject. Another nice feature is how user friendly this site is and every thing can be searched by subject or grade level. Also, there are some nice features for rating a test and then sharing w/ your favorite social network.
I highly highly recommend checking out Gnowledge by clicking here!!!!