Hamlet

Shmoop guide to Hamlet by William Shakespeare. Smart, fresh Hamlet analysis...
http://www.shmoop.com/hamlet/

essays on Shakespeare and papers on Shakespeare's plays...

Shakespeare - essays and papers on the plays and poems of William Shakespeare...
http://www.shakespearepapers.com

The Arden Shakespeare at Thomson Learning...

Arden Shakespeare...
http://www.ardenshakespeare.com