Some of my friends & family use Polarsteps.com to share their routes (and photos), whose UI is comparatively slick. I'm afraid of the lock-in, though, and would

Some of my friends & family use Polarsteps.com to share their routes (and photos), whose UI is comparatively slick. I'm afraid of the lock-in, though, and would be much more interested in an open-source solution. Does anyone happen to know any?