About those vector icons · Pushing Pixels
Plastique Icons Full Set
is a set of 434 (and growing) web and application icons inspired by advertising clip art of the 1920′s and 1930′s. The set is available in vector format and also includes a CSS/PNG sprite version. → GPL Licensed Version (download) : http://iconify.it/?file_id=9
Free Classic Clip Art Icons
iconSweets 2
… a huge FREE icon set containing over a 1,000+ icons, all in a vector-shaped Photoshop format.
pictoico
Glyphish
Icons for iOS apps, WatchKit, nav bars, tab bars. @3x sizes too.
Brightmix icon set
30 Free Vector Icons
Free Vector Icon Set 1
... 25 Icons. You’re though completely free to edit, change and/or directly use the icons in your site and in any kind of your projects.