Bruce Galpin created Google+ Stylish UI Buttons, Google+ Icons and dropdown menu buttons sharing a framework of good-looking icons in his blog.
The buttons can use text, images or both inside them and comes with the high-quality icon set created by WebDesignShock.
As the icons have both standard and active state versions, buttons respond well to hovering them.
There is also a drop-down menu buttons version provided which is handy for presenting multiple options while still being in harmony with the rest of the buttons.
Compatibility: All Modern Browsers