Is Fatcow icon set freely used in selling theme?
And do you guys know where can I find any free icon resources ?
You can use Fatcow, but you have to attribute the author. This is the license:
And you can find all icons here:
If you link, they will award you. To take sneak preview on FatCow’s [link removed]
Iconfinder is pretty good too. Careful with the licence