SimpleX is an icon theme based on Simple, one of the most awesome and complete icon theme. Several icons come from that base.
EVERY icon added is just taken from ICONFINDER.COM, so icon licenses are a mix of GPL/CC.
Simple icon theme is not necessary to be installed in order to use this icon theme.
Mixed GNU/GPL and Creative Commons.
All of the icons are from Simple icon theme OR taken from various artists from Iconfinder.com.
All rights reserved to their respective owners.