University of Pennsylvania
Univ of Pennsylvania: Imagism
Defines the movement of poetry, "imagism" and describes the "imagist." The site also gives five characteristics of an imagist according to an Imagist manifesto.
Academy of American Poets
Poets.org: A Brief Guide to Imagism
Contains a brief explanation of the Imagist school of poetry. Also includes a copy of Ezra Pound's "In a Station of the Metro" and the three tenets of Imagism as defined by Pound.