Woocon
The actual license is “freeeeeee”, so I assume it is free for all purposes. Ask first to be sure.
Woocon is a free Icon design resource made by Dribbble user Piervincenzo Madeo. As far as I can tell, its license is Free for Commercial and Personal Purposes.
Helpful hint: Dribbble users are nice. If the license is unknown, it is usually because they forgot to mention it explicitly; not because they were being stingy. Ask nicely and they will probably allow you to use it.
