These icons are available under a Creative Commons Attribution 3.0 License .
Fugue Icons 3.5.6
3,570 icons are included in PNG format (16x16 pixels) + 352 bonus icons.
If you can’t or don’t want to provide attribution, please purchase a royalty-free license.
Icons8 Recommended
100,000+ icons in PNG format in all sizes + HTML codes + SVG + fonts.
Diagona Icons 1.0
400 icons are included in PNG format (10x10 and 16x16 pixels).
If you can’t or don’t want to provide attribution, please purchase a royalty-free license.