For Your English Teachers: OpenSourceShakespeare.ORG
Link 1: Open Source Shakespeare: search Shakespeare's works, read the texts
The site includes: Plays, Poems, Sonnets, Concordance, Search, Advanced Search.
More than just a collection of texts...
Open Source Shakespeare attempts to be the best free Web site containing Shakespeare's complete works. It is intended for scholars, thespians, and Shakespeare lovers of every kind. OSS includes the 1864 Globe Edition of the complete works, which was the definitive single-volume Shakespeare edition for over a half-century.
Link 2: Concordance of Shakespeare's complete works :|: Open Source Shakespeare