MapPress is the most popular and easiest way to create great-looking Google Maps and driving directions in your blog.
Powerful AJAX-based search alternative which supports faceting queries by taxonomies, terms, location, and post metadata.
Extends WP Geo plugin with useful tools for easy migration from the Geo Mashup plugin and other missing features in WP Geo.
Nice Map is a WMS client for WordPress. It offers compatibility with geo-mashup and a clean interface for displaying maps.