Defence of Poetry: Part First by Percy Bysshe Shelley - Plain text site, edited by members of the Department of English at the University of Toronto.
In Quest of Percy Bysshe Shelley - Discussions, biography, poetry sampler, and quotations.
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."
Leavis on Shelley and Shakespeare - A brief comparison of some lines from Shelly's The Cenci with lines from Shakespeare's Measure for Measure.
Percy Bysshe Shelley, Radical Romanticism - Top biography gives a description and interpretation of the poets' work. Includes major works, quotes and chronology.
Romanticism and Shelley's - An essay by Patrick Mooney about Romanticism in Percy Shelley's poem "Ode to the West Wind." Includes a bibliography and links.
Shelley's "To a Skylark" - A personal appreciation in the form of an essay on the poem.
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.