Easy Image Search
One way to find out if any of your images are being used is to do a reverse look-up of your images. There are two ways of doing it with the exact same results: the drag and drop method or the copy and paste method.
Drag and Drop Method
Have both the page with the image you would like to search as well as the Google Image search windows (or tabs) open. Simply drag your photo from your blog...
...into the Google Image search box.
You will see all of the websites that are using your photo. This is really neat because you will probably discover new blogs or sites that have written about your post and are using your image.
Copy and Paste Method
Shauna from The Best Blog Recipes gives an excellent tutorial on how to do a reverse image look up by simply copying the link from the image and pasting it into Google search. Check it out!
Free Content Checker Tools
Imagine, reading an interesting article that you recently posted on your own site and you realize some of these sentences or paragraphs sound familiar. You read your own article and noticed the site copied and pasted your exact article. How angry would you feel? Well, for starters,see if you can find any site that is using your content. How? Simple: free online plagiarism detection tools.
Copyscape is a free and easy tool to use. Simply copy the URL of the page you want to check into the search box.
Formerly known as CopyrightSpot, Plagspotter shows a percentage of matched content, providing you with the number of words matched.
CopyGator is a free service that analyzes your content through your RSS feed and notifies you of any copies made online.
With DupliChecker, you can either search your content through a copy and paste method or upload your entire post document to search.