Stuck in a running rut? Walk Jog Run utilizes Google Maps and community involvement to map out the best routes in your area. Just input your address and user-generated routes will appear, handily mapped out and measured by distance, speed and calories burned. It's perfect for adventurous types or travelers who want to exercise while sightseeing. And there's no need to carry an open laptop on your jaunt — Walk Jog Run also offers a companion iPhone app. (See Walk Jog Run's mobile app.)