Wikipedia Preview lets you show a popup card with a short summary from Wikipedia when a reader clicks or hovers over a link.
Adds explaining tooltips querying their content from a MediaWiki installation, e.g. Wikipedia.org.
Add the power of Wikipedia to your Blog.
Quickly add Links to Wikipedia, IMDB Sites or search for site/blog or news with Google. And New with 1.3 also your bookmarked Links.
The Embed Wikimedia plugin adds support for embedding photos from Wikimedia projects such as Wikipedia.