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.
Scholastic
Scholastic: Chants and Street Rhymes [Pdf]
Four pages of with chants and street rhymes. Three of the pages are reproducible examples and information useful to young scholars, and one page gives lesson ideas for teachers.