http://nfs.sparknotes.com/  no fear shakespeare helps you understand parts of the story you don't understand.
http://alliemacb.hubpages.com/hub/How-To-Understand-Shakespeare This site tells you the form of shakespeare words
http://www.enotes.com/othello-text/strategies-for-understanding Tells you Strategies for Understanding Shakespeare's Language.
http://www.cliffsnotes.com/study_guide/literature/othello/play-summary.html help you understand the play.
http://www.ehow.com/how_2057570_understand-shakespeare.html This site give you steps to understand othello

I think I would use spark notes before I would use an other ones.