Play online study games (There are over a million items in Study Stack for geography, history, business, math, science, many languages, medical and standardized tests such as the SAT, ACT, GRE and LSAT. Download them to your cell phone, PDA or iPod to study on the go.)-StudyStack
Create your own virtual flashcards or locate some to match your needs - Flashcard Machine
Work on memorizing materials with 3 different kinds of testing - flashcards, multiple choice and matching. - Memorize.com\
Understand complicated texts and tests better - SparkNotes.
