Biography.com: Montaigne, Michel de: Concise profile of this 16th-century essayist.
Books and Writers: Michel Eyquem de Montaigne: Biography of this French courtier and author.
Catholic Encyclopedia: Michel-Eyquen de Montaigne: A concise study of the thinker, by Georges Bertrin.
Columbia Encyclopedia: Montaigne, Michel Eyquem, seigneur de: Short entry from the 2001 edition.
FOLDOC: Montaigne Michel Eyquem de: Entry and recommended reading from this philosophical database, with links to related entries.
Great Voyages: Michel de Montaigne: Timeline and brief profile of this Renaissance scholar, along with an online edition of Charles Cotton's translation of the Essays.
Lillian A. Wells Collection of Montaigne Editions: Basic information on this special collection housed at the University of Chicago.
Montaigne and the Word Processor: An on-line paper by Daniel Chandler concerning the experience of writing, and treating Montaigne as a phenomenologist of writing.
Montaigne Made Easy: A plan for interpreting Montaigne's writings on a mythological mnemonic basis.
Montaigne On Solitude: Review of this essay, with excerpts.
Montaigne Studies: An annual interdisciplinary journal. Includes tables of contents and ordering information, in addition to online portraits of and French texts by Montaigne.
Montaigne; or, the Skeptic: An excerpt from Ralph Waldo Emerson's Representative Men, detailing his own intellectual relationship with Montaigne and skepticism.
The History Guide: Michel Eyquem de Montaigne: Some annotated links, a portrait, and the full text of Montaigne's essay On the Education of Children.
Wikipedia: Michel de Montaigne: Entry on the Renaissance scholar, from this openly-edited reference initiative.