Thanks to a post by Tetsubo I found this cool blog; RPG Creatures it has a small but growing collection of some really unique and interesting beasties that could be useful for all kinds of campaigns.
Check it out!
Please note not all the images featured on this site are my own. When possible I have used public sources or have gotten permission to use the images I have posted. If I have inadvertently used someone's artwork without proper authorization please let me know and I will promptly remove it.