Just recently we decided to release the sprite graphics of a product we developed here at Planar Studios free for non-commercial use. The graphics are from a presentation-like exploration game that was developed for a school located in Finland.
The library consists of roughly 500 sprites from animated and static characters to various furniture and objects. It's all organized in categories. Additional details concerning the organization are written in the bundled readme-file.
As written in the topic these sprites are released under the Creative Commons Attribution-Noncommercial 3.0 Unported license. Roughly broken down it means that you can do whatever you want with them as long as you give a fair credit to the original author. For commercial use you'd need a specially granted permission to use this library altogether. All this is written in greater detail in the bundled text files. License details are also available here: http://creativecommons.org/licenses/by-nc/3.0/
To the point then. Here's some random picks from all of the library's categories. This picture should give a good idea of the style and looks of the sprites.
Some examples for the use of the library:
-base for game graphics
-graphics for tutorial/demonstration code
-placeholder graphics for rapid development
-game graphics study
Download the library here:
Direct download: http://planar-studios.com/download.php?file=niilulib
Make sure to drop a line or two in my email if you find the sprites useful, I'm interested in the stuff people produce.
Edit: bbcode fixes