Check out this free Firefox and Google Chrome blogging tool named Zemanta. This tool scans your post content and provides related images and links that are very relevant. This is good for the real estate agent that gets stuck on finding good pictures to use for their blog posts.
Since this is not our tool as we are only showing you how to use it, be sure to check that any image you use is allowed. If you ever come across issues with not being allowed to use an image you used from Zemanta then take it up with them (they are the creators of the program).
Go to Zemanta for the tool.
Check it out now!