StumbleUpon - Free Web Icon

This StumbleUpon icon is part of an icon pack of 61,700 web icons. Icons are available in PNG, SVG, CSS, PDF, and EPS formats, as a font, and in other vector formats. Unlike other icon packs, our web icons are designed by a single designer, guaranteeing the consistent style and quality.

Idea of StumbleUpon Icon by Anonymous

We've received the idea on July 18, 2012 and created the icons on July 22, 2012

I know some have been already posted, but this unifies all of them plus more. 1. Soundcloud 2. Pinterest 3. Stumbleupon 4. Wikipedia 5. Instapaper 6. Tumblr 7. Dribbble