University of Toronto (Canada)
University of Toronto: Selected Poetry of William Blake (1757 1827)
Full text of 40 annotated poems by William Blake.
ibiblio
Ibiblio: Web Museum: William Blake
Information about William Blake's life and examples of his engravings.
Other
Dickenson College: Blake on Nature
This site from the Dickenson College provides a look at William Blake's philosohy on nature as evident in his writings. Provides links to other criticisms as well.