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3. Pinvoke (www.pinvoke.com/)

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6. Two Tone Icons (www.2pt3.com/news/twotone-icons-for-free/)

7. Exploding Boy (http://www.exploding-boy.com)

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10. N Design (www.ndesign-studio.com)

11. Greyscale (www.e-lusion.com/design/greyscale/)

12. Minimal Icons 1.8.6 (http://sryo.deviantart.com)

13. ASP NET Icons (www.aspneticons.com/)

14. BS-Markup (www.bs-markup.de/iconsets)

15.Fast Icons (www.fasticon.com/freeware/

16. Glyph Lab (www.glyphlab.com/)

17. Graphic Push (www.graphicpush.com/icons)