Outline style icons are very useful and truly popular nowadays. They easily complement any subtle and elegant design, making it look more sophisticated and harmonious. Of course, they won’t provide great contrast since they rather thin to easily stand out on a background alone, so before implementing them on your project you should definitely take into account what type of a canvas you will have. Also such type of icons are more appropriate for app interfaces, rather then for web design that richer in elements, decorations and simply greater. Outline style icons shoudn’t be lost.
Today I have decided to bring together comprehgensive collection that consists of polished and minimal outline icons that serve various purposes. You can use icons free of charge, but take a look at its license, since some of them have restrictions.
8.Jollyicons – set of amazing handdrawn icons
24.Washing Icons – Free icon set by Dominik Rezek
46. iOS7 UI Kit