John Donne (1572-1631)
http://www.luminarium.org/sevenlit/donne/
Luminarium's resources on Donne with links to quotations, a list of works, and biographical information. From here one also can find more information about early 17th-century English literature, Renaissance English religious writers, and the metaphysical poets in particular.
John Donne: 1572-1631
http://www.poetryfoundation.org/archive/poet.html?id=1825
The Poetry Foundation provides an excellent critical overview and some explanations of some of Donne's better-known poems.
John Donne
http://www.online-literature.com/donne/
The Literature Network offers a biographical sketch and links to to searchable texts of many of Donne's works.
John Donne
http://www.poemhunter.com/john-donne/poems/page-1/
PoemHunter.com provides a huge collection of online texts of Donne's poetry.
The John Donne Society
http://johndonnesociety.tamu.edu/
This academic society includes an online forum and information about the society's annual conference.