Websites
The best part of this site is that little button that says "Poetry." It's his collected works. Nice. You can read selections of his essays, which are almost as good as his poetry.
A website maintained by folks who want to preserve Coleridge's legacy.
It's too bad there aren't a lot of detailed biographies of Coleridge available online, but here is a brief biography and a good reading list.
Video
A British man gives an accurate, professional reading of The Rime of the Ancient Mariner. At least you'll know how to pronounce "eftsoons."
Another good British reading of the poem, showing pages from Gustav Doré's famous illustrated publication.
Audio
Images
The poet as a young man.
A scene from the "zombie" portion of the poem, when the bodies of the sailors begin to work the ropes. The drawing is by Gustav Doré, whose illustrations of the poem are classic artworks in their own right.
Historical Documents
Books
Dore's drawings for his edition of the poem are among the most famous illustrations of classic literature ever produced.
Coleridge was also a fantastic reader and critic of literature, and this book is still used widely by teachers and professors.