This is a site that I find endless ideas and inspiration from, http://www.creativemyk.com/ CreativeMYK is a community of church graphics types who both post things to get feedback as well as post things for other churches to use, for free! I’ve used quite a few of their free graphics (you have to look carefully, there are only certain sections of the site that you can legally use in your church), and many of them are fantastic!
Check them out!