AQwikWiki is a great Firefox extension which brings Wikipedia closer.
You're reading an article and suddenly an unfamiliar word pops up. Usually you would wiki the word and then return to the original page. Well, no more unnecessary trips - introducing AQwikWiki! Select the word(s), click AQwikWiki, and the first line from Wikipedia will appear right next to the term.
Requirements:
· Firefox 3.0 - 3.0*
What's New in This Release: [ read full changelog ]
· Added requested Wikipedia language support.