GeoDirectory is described as 'GeoDIrectory is the fastest growing Directory Plugin for WordPress. It comes free with some limited features, for example with the free plugin it is possible to create single city directories'. There are three alternatives to GeoDirectory for Self-Hosted solutions and Wordpress. The best alternative is HivePress, which is both free and Open Source. Other great apps like GeoDirectory are phpListings (Paid) and WP Job Manager (Freemium).
WP Job Manager is a lightweight job listing plugin for adding job-board like functionality to your WordPress site. Being shortcode based, it can work with any theme (given a bit of CSS styling) and is really simple to setup.