Wiki Widgets are extensions for MediaWiki that provide simple ways to embed information from other sources within a wiki page. For example here's a

(tags: widgets googlemaps api neogeography tools geo)

The GeoRSS plugin introduces an easy interface for geotagging MediaWiki articles, and publishes a GeoRSS feed of all mapped articles in the Wiki, for mapping and syndication.

(tags: wiki maps georss geo)