While looking for album art for my latest Kompoz project, I recently discovered the Wikimedia Commons site.  As the name implies, the site is a collection of "media" files, which can be shared freely; including pictures, music, icons, and more.  The tag line says it all: A database of 3,243,621 freely usable media files to which anyone can contribute.

As you search through the site, you'll find that each media file which is available for download is tagged with a license.  Some of the licenses I came across include:

• This image (or other media file) is in the public domain because its copyright has expired
• Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License
• This file is licensed under the Creative Commons Attribution ShareAlike license
• Public Domain. U.S. Navy Photo
• Plus others...

Most images also include a description, date, and source.  Content is organzed by topic, by media type, by location, by license, and by source. 

So there -- no more excuses for Kompoz projects with no album art.