Websites that are driven through a CMS often have one or several buttons that allow the user to access the site’s RSS feed (like this ) or add it to a news aggregation site (like this , or this ). If you, like me are not very talented with Photoshop, making these buttons can be a pain and / or the free ones you can find on the web are not quite what you want.
This site makes it easy. It has a simple web interface that produces an image based on your specifications. Try it out (free and no ads).