Davidsbündler: Heinrich Heine: English translations of three prose selections, and several poems. Concentrates on the author's more biting observations.
Encarta: Heine, Heinrich: Short biographical article.
Heinrich Heine (1797-1856): Biographical essay on the German poet and satirist. Includes bibliography.
Heinrich Heine: Selected Poems: Twenty-three poems in English verse translation by A.S. Kline.
Poems by Heinrich Heine: English translations in the public domain. Eight poems.
The Columbia Encyclopedia: Heine, Heinrich: Concise biographical entry.
The Jewish Encyclopedia: Heine, Heinrich: In-depth article on the German lyric poet. With portrait.
Wikipedia: Heinrich Heine: Biography, with copious links to related topics, and selected bibliography.