Shorter Prose Pieces - In plain text or as a zip file. - http://www.gutenberg.org/etext/2061
Selected Prose of Oscar Wilde - A collection published in 1914. Available in plain text or as a zip file. - http://www.gutenberg.org/etext/1338
ClassicReader.com: Oscar Wilde - "An Ideal Husband;" "The Importance of Being Earnest;" "The Picture of Dorian Gray;" and several short stories. Searchable HTML. - http://www.classicreader.com/author.php/aut.62/
The Soul of Man - In searchable HTML, at World Wide School. Divided in two parts. In graphical browsers, this is the online equivalent of a "large print" edition. - http://www.worldwideschool.org/library/books/socl/publicadministration/TheSoulofMan/toc.html
Literature Network: Oscar Wilde - Searchable HTML etexts of various works; author biography. - http://www.online-literature.com/wilde/
Monologue Archive: Oscar Wilde - Includes texts from the plays suitable for independent performance. - http://www.monologuearchive.com/w/wilde_oscar.html
The Oscar Wilde Collection - The site brings most of Oscar Wilde's works, in nicely-formatted HTML and PDF. - http://www.planetmonk.com/wilde/index.html
Bibliomania: Oscar Wilde - The complete shorter fiction and poems in prose: HTML and PDF etexts. - http://www.bibliomania.com/Fiction/wilde/stories/index.html