CSS Library: Links & Buttons: CSS3 demos: Here
Slide Out Social Icon Buttons
Author: Dynamic Drive
These space saving social buttons slide out into view one at a time when the user clicks on
the main button, The social icons appear tucked away and invisible initially,
by placing them inside the "back face" of a DIV and setting the DIV to "
hidden". To reveal the icons, the DIV is flipped to show its backside
containing the icons. This novel approach lets you store away content behind
another content of a different size and show the former on demand.
Slide Out Social Icon Buttons works on all major browsers and platforms (including mobile), including IE9+.