WireframeSketcher wireframing tool comes with more than 200 vector icons that we’ve specifically designed for wireframing. You can freely use these icons in your own websites and apps. Icons are designed on a 16 pixel grid and scale well to different sizes.
WireframeSketcher icons are licensed under Creative Commons’ Attribution-ShareAlike 3.0 Unported License (CC BY-SA 3.0) – http://creativecommons.org/licenses/by-sa/3.0/
If you use these icons, please add a link to WireframeSketcher (http://wireframesketcher.com) somewhere on your site or in your app.
Note that icons that are available from Mockups Gallery are licensed under their own terms.
You can get these icons from WireframeSketcher GitHub repository. Icons are provided in SVG and PNG formats.