How to Cite to Shakespeare's Plays: Examples for quoting Richard II and others.
Interactive Shakespeare Project: Geared toward teachers. A pedagogical approach to teaching the works.
MaximumEdge: Shakespeare: The complete texts of all of Shakespeare's plays, indexed by scene and searchable.
Shakespeare List: Listing of Shakespeare plays published between 1594 and 1623.
The Oxford Text Archive: The plays, downloadable in various formats.
TheFreeLibrary: Shakespeare, William: Complete works, searchable concordance enables users to locate particular words/phrases in the plays.
Titles from Shakespeare: A listing of book and play titles derived from the words of William Shakespeare.
William Shakespeare's Plays: Complete plays, plot summaries, key dates, characters, and history.