I just discovered Feed Your Soul: The Free Art Project. Check it out here. They feature free art that you can download and print for your own personal use. What a great (and inexpensive) way to add some color to your space! Many of these are great for nurseries (see previous post), which is where I stumbled upon this site (thanks to goodfoodgoodfriendsgoodlife).
Here are a few examples of some of my favorite images: