Would you like to visualize a paint color on your walls before you paint? If so, this is the easiest online virtual paint program I've tested to date: http://www.hirshfields.com/visualizer/index.html Just click on the blue "Use your own photos" button, upload your photo, select a color, then click on the area of the wall you'd like to paint. Voila!

With Virtual Painter from hirshfields.com you don't have to download anything or register and you can still save your updated photos to your computer or email them to friends by clicking on the "Share" button.

Virtual Painter isn't a fancy or detail-oriented program, but it will give you a good sense of how the color range you're thinking of might look on your walls. And generally speaking the fancier the program gets the less user-friendly it gets. Virtual Painter is user-friendly and gets the job done.