Haldaug

<p>This plugin creates a widget that displays excerpts from Wikipedia on the tag pages (the template tag.php). The user can specify multiple languages for the plugin to query using the Wikipeida API. The language that has an article that matches the tag has its article displayed.</p>
<h3>Credits</h3>
<p>This widget is based on the WordPress-Wikipedia-Widget by patlockley: <a href="https://github.com/patlockley/WordPress-Wikipedia-Widget" rel="nofollow ugc">WordPress-Wikipedia-Widget</a></p>


Wikipedia for tag pages

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

Alexander Rauscha

<p>InfoLink adds a Button to the Editor, so you can easy link words from your post to wikipedia, imdb (supports English/German/Espanol/Fran?ais wiki and imdb) or any site searched by google. Just select a word or sentence and click on the button or chose a service from the menu. The Word will be automatically searched and infolink will select the most meaningful result. (with the option to edit them)</p>


InfoLink

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.

Wikipedia for tag pages vs InfoLink