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.

Creates links to Wikipedia with different languages

Enhance your site with Wikipedia summary boxes! Offer instant info previews on existing and new Wikipedia links without altering your website code.

Click to Translate is a bilingual dictionary lookup tool for every WordPress site. Definitions from Wiktionary and Wikipedia.

Add wikipedia extracts to your page as a widgid, above or under your content or using shortcode's wherever you like.

Wikipedia Anniversaries is a widget that lets your visitors to see important history dates from Wikipedia.

Wiki on Medal is a widget that lets your visitors to see article on medal (featured article) from Wikipedia.

A widget that displays excerpts from Wikipedia articles relevant to the tag on tag-pages. Support for multiple languages.

Shows a simple Ajax based Wikipedia search-formular and the results for the current post/page title or default keywords.

An easier way to link to Wikipedia.

Easily embed links to wikipedia topics, amazon book sales, php documentation, and more with [ln linktype]topic[/ln].

This plugin replaces [wikipedia]topic[/wikipedia] with a wikipedia search link for that term.

WikiBiographie offre la gestion de biographies et la synchronisation du contenu avec Wikipédia en français.

wpToWikipedia crea un widget che inserisce un link a wikipedia relativo al titolo dell'articolo, cerca ossia il titolo su wikipedia.

See today's Wikimedia Commons picture of the day behind WordPress login screen.

Enrich your posts by adding a quick, 'visual' Wikipedia-driven search.