Recently I discovered a great project 365cons, by a Seattle visual designer Amy development, the site is updated daily release allows users to download a free icon! Amy set a goal for himself: in 2016 every day to deliver a new bubble to explore a variety of styles and design practice related technologies. These figures are related to the daily lives of the designer is not limited to a particular topic.
Icon format 365cons include: SVG, PNG two versions, each one can be shown on the page preview, without registration you can download for free. Illustrated License mining MIT License, can be downloaded for free use anywhere.
Link : http://www.365cons.com/