CCFinder

If you need to use some image you found on the Internet, it's possible you're violating a copyright. One option for avoiding legal problems is to make sure the image has a Creative Commons license covering its use.

CCFinder is an interesting search engine where you can type in keywords and search the thousands of images under Creative Commons license to be found on the Internet.

You can adjust the filter to see editable or non-editable images, ones that can or can't be used for commercial purposes, or ones that require photographer credits or not.

Also, the application lets you access the original source, download the image to your computer, and even apply some simple filters.

CCFinder presents a practical way to find the image you're looking for and make sure you don't violate any copyrights.