The Pollak Library "Rights-Free Media" Guide will help you find "rights-free" and "rights-light" media and content that is available for re-use, sharing, and oftentimes modification (aka "remixing").
When you browse this guide you will find:
Copyleft public domain image courtesy of Wikimedia Commons.
Animoto is an online video maker that turns your photos, video clips and music into video in minutes. Pick a video theme, and music from their library (or upload your own). Free plans allow unlimited 30 second videos. Videos can be published to YouTube, your blog, or other social sites.
A tutorial on Pixlr Editor. This photo editing program mimics a lot of the core functionality and UI of Adobe Photoshop while sacrificing some of the more advanced features in place of usability. This is a great program for anyone intimidated by Photoshop, and looking for a less complex image editor. Also.... it's free.