From Ryzom Commons
What is Ryzom Commons?
Ryzom Commons is a media file repository making available public domain and freely-licensed media content (images, sound and video clips) affiliated to Ryzom to everyone. It acts as a common repository for Ryzom Wiki, but you do not need to belong to one of those projects to use media hosted here. The repository is created and maintained not by paid-for artists but by volunteers.
Ryzom Commons uses the same wiki-technology as Wikipedia and everyone can edit it. Unlike media files uploaded to other projects, files uploaded to Ryzom Commons can be embedded on pages of all Ryzom Wiki projects without the need to separately upload them there.
Unlike traditional media repositories, Ryzom Commons is free. Everyone is allowed to copy, use and modify any files here freely as long as the source and the authors are credited and as long as users release their copies/improvements under the same freedom to others. The Ryzom Commons database itself and the texts in it are licensed under the Creative Commons Attribution/Share-Alike License. The license conditions of each individual media file can be found on their description pages.