Free: All time
Depending on what nationality you have, visa fees can cost quite a bit. Perhaps a way to save that money upfront, even before landing in your destination, is to try to visit the countries that are visa-free for you. VisaMapper is a site that provides a quick glimpse of each country visa requirement according to your citizenship via a world map. Granted that it doesn’t offer an in-depth information, VisaMapper is a good place to get a rough idea and to get jealous at the Britons! (British citizens tops the list for visa-free travel at 166 destinations across the globe.)
Website: www.visamapper.com