Praise of Folly - John Wilson's 1688 translation of this, Erasmus' best-known work. - http://www.ccel.org/ccel/erasmus/folly.html
Squashed Erasmus - The Condensed Edition of Desiderius Erasmus' In Praise of Folly - http://www.btinternet.com/~glynhughes/squashed/erasmus.htm
Erasmus Text Project - Latin and English texts presented by Chris Cudabac. Also features a number of pictures of Erasmus. - http://smith2.sewanee.edu/erasmus/
Catholic Encyclopedia: Desiderius Erasmus - Article by Joseph Sauer from this 1912 reference work. An extensive overview of the life, works and impact of this scholar. - http://www.newadvent.org/cathen/05510b.htm