Rutgers University
Rutgers University: An Essay of Dramatick Poesie by John Dryden
Abridged version of the famous essay by John Dryden.
Other
Lyricalworks: Poetry, Poesy, Lyricism
A site that gives an explanation of lyric poetry, and explains their differences from epic poetry. Includes a link to an example of a lyric poem.
University of Toronto (Canada)
University of Toronto: John Dryden
The complete text of Dryden's most important critical prose work is available here from the University of Toronto.
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.