This is an excellent round up of best free icon sets 2013 . This post contains the best collection of different styled free icons for Web and UI designs.
Here are some simple icon designs. I like how easy clean they are and each one has a specific opening to it that allows the icon to be a part of the background. I also like how they are all see through and tie in well the background also.
Set of Thin Line Flat Design Icons of Design, Development and SEO
Buy Set of Thin Line Flat Design Icons of Design, Development and SEO by PureSolution on GraphicRiver. Set of modern thin line icons of graphic design, website and app design and development, seo, art and creative proces.
Dmitri Litvinov / Icon set for Quoterobot – “Ten Steps to Escape Your Digital Hub”