Pixorize is a free tool for adding interactive annotations to your images. Using Pixorize is a fairly straight-forward process. To get started just upload any picture that you have saved on your computer. (After your image is uploaded you may need to resize it to make it fit into your browser). Once the image is uploaded you can add points, circles, squares, and stars as annotation markers on your image. After adding an annotation marker you can write text to explain the element of the image to which you are calling attention.