Leavis on Shelley and Shakespeare - A brief comparison of some lines from Shelly's The Cenci with lines from Shakespeare's Measure for Measure. - http://unix.cc.wmich.edu/~cooneys/tchg/440/cenci.html
In Quest of Percy Bysshe Shelley - Discussions, biography, poetry sampler, and quotations. - http://www.aspirennies.com/private/SiteBody/Romance/Poetry/Shelley/pbshelley.shtml
The Percy Bysshe Shelley Resource Page - Includes an extensive bibliographical database; electronic texts of Shelley's letters, essays, and fragments; and links to other useful Shelley resources. - http://www.wam.umd.edu/~djb/shelley/home.html
Shelley's "To a Skylark" - A personal appreciation in the form of an essay on the poem. - http://www.globalpoet.com
Keats-Shelley Journal - "These pages are a service of the Keats-Shelley Journal, which is published (in print form) annually by the Keats-Shelley Association of America." - http://www.luc.edu/publications/keats-shelley/ksjweb.htm