The Irish Poetry Page Features links to many Irish poetry sites. Many of the links have the full text of poems. Old Arcadia A tribute to Elizabethan poets and playwrights, including Shakespeare. This site has many, many Keats links. This site offers reading groups and book reviews.
Poetry is only one section.
Has the full text of many copyright free texts and poems. Search for the author of your choice. This site has a very large collection of copyright free poems. A short biography of John Keats and links to three of his poems. This site has the complete text of hundreds of poems.