Leaflet.Social
Very simple yet effective sharing buttons Leaflet control. It adds Facebook/Twitter/Google+ sharing buttons as a basic links. There is no external scripts, no iframe, or any other polluting elements. It shares the current url, so if you use Leaflet-hash, it will share the current zoom and position.
Uses Font Awesome icons.
Usage
L.control.social({default_text: "Guess where I am"}).addTo(map);
See an example.