British Library
British Library: Shakespeare in Quarto
The very first printed versions of Shakespeare's works are available here at the British Library for looking at, comparing and examining. Also includes valuable links about Shakespeare's plays as they have been performed through the years.
Other
Homeric Singing: An Approach to the Original Performance
A short, but intersting site that explains the theory as to how the ancient Greeks may have performed their music.
Other
Shakespeare Is Elementary!
Designed as a resource for teaching Shakespeare to elementary students, this site includes student work, ideas for teachers, a PowerPoint of Shakespeare's life, some Shakespeare Web site links and recommended plays.
Other
Bob's Byway: Glossary of Poetic Terms
Calling itself "unique," Bob's is easy to use, with cross-links throughout, phonetic pronunciation guides when necessary, and many examples and quotations. Click on the letter and scroll for the word.