The WP Pro Geo Targeting plugin is the perfect solution to geo-target users depending on their country! WP Pro Geo Targeting is based on the excellent Maxmind GeoLite IP database. It allows you to accurately target 99.8% of your users.
Geoamplify – Powerful geo targeted URL redirection service for websites. Also create images, popups & HTML content that changes based on visitor IP geolocation. The multi-user version allows users to buy impressions which is deducted from their account for each redirect or popup.