Available options:

1. Choose to display the icons when user click or mouseover.
2. Icon (all the Font Awesome icons are available), icon color, icon link, icon tooltip, icon margin.
3. Icon display position: top, bottom, left or right.
4. Tooltip position: top, bottom, left or right.
5. How to open the icon link, _self or _blank.
6. Custom class for the thumbnail and icon.
7. And more…

Some other examples:

Great shots from markjsebastian