Set of 98 RPG icons, free for commercial use
You can download a pack with them all in individual .png files here:www.4shared.com/zip/1LR065wM/R…
These are some other icons I had made for a personal project that I canceled some years ago. You can download them and use on commercial projects if you want
Attribution 3.0 Unported
CC BY 3.0
This license lets others remix, tweak, and build upon your work even for commercial purposes, as long as they credit you and license their new creations under the identical terms. This license is often compared to “copyleft” free and open source software licenses. All new works based on yours will carry the same license, so any derivatives will also allow commercial use. This is the license used by Wikipedia, and is recommended for materials that would benefit from incorporating content from Wikipedia and similarly licensed projects.
-> Crediting not entirely necessary, do it when possible.