Vector format user icon set for commercial use OK for free use

We produce and sell numerous icon setsIconShockWe distribute free icon set in vector format indicating user. Commercial use is also OK, but redistribution / sale is prohibited.

Complete and free user icon set - iconShock
http://www.iconshock.com/icon_sets/vector-user-icons/

The user icon looks something like this, from a businessman-like thing to a doctor, a family, a variety of clothes, hairstyle and skin color are available.

For Windows 8

For iPhone

For Android

In many cases, Icons like a single impregnant are used as user icons, but there are various variations like this, so it seems to be user-friendly.