The standard buttons provided by third parties (such as Facebook, Twitter and SoundCloud) vary in size, style and interactivity. A consistent button set could reduce a lot of that visual noise and inconsistency. Furthermore, having it in CSS format means that changing the text for certain actions would be a breeze for developers, and it also allows administrators of non-English websites to translate labels into their native languages.
The button set was designed from the beginning to require no extra markup, and the elements used are entirely the choice of the (semantically considerate) designer. All buttons are fully scalable and customizable, and they degrade gracefully on older browsers, although the aesthetics in IE 6 and 7 are admittedly inferior to image-based alternatives.

group of social media buttons for wordpress and blogs.

The idea behind this project was to produce a consistent set of buttons that could be used for the range of social actions frequently taken in Web applications. These actions are often important goals for users, such as connecting third-party accounts or sharing content to third-party platforms, so their appearance has to be attractive and clear.
The standard buttons provided by third parties (such as Facebook, Twitter and SoundCloud) vary in size, style and interactivity. A consistent button set could reduce a lot of that visual noise and inconsistency. Furthermore, having it in CSS format means that changing the text for certain actions would be a breeze for developers, and it also allows administrators of non-English websites to translate labels into their native languages.
The button set was designed from the beginning to require no extra markup, and the elements used are entirely the choice of the (semantically considerate) designer. All buttons are fully scalable and customizable, and they degrade gracefully on older browsers, although the aesthetics in IE 6 and 7 are admittedly inferior to image-based alternatives.
No raster images or sprites were used. Instead, vector icons were inserted using a custom font file, an @font-face rule and pseudo elements. For more information, John Hicks has an informative write-up on this technique.

The $144,146,165 button