Customize maps in your post, pages and widgets. Add geotag to your blog and site. Use GPX, KML, ...
OpenStreetMap plugin to embed a map with markers to articles from different categories in different map layers.
Quickly and easily add links to your blog posts, which when clicked, starts up the Google Earth program at the specified location (lat/long).
Changes Geocaching-IDs into Links to their listing pages on geocaching.com
gcStats plugin to embed some statistics with found geocaches in your blog.
This Plugin makes Geocache Bloggers life easyer, with a little Waypoint linking shortcut.