ImageMagick and GD are two of the most frequently used graphic software libraries available on the market. They make the dynamic creation and editing of images and graphs on a website possible, so they must be available on a server if you host your internet sites on it and you prefer to have something different from static images with fixed dimensions. If ImageMagick and GD are installed, you will be able to edit any image in many ways - create thumbnails, change the colors, flip it, blur it, and so on. Naturally, these changes are feasible if the script app that you employ on your website allows you to do such things. The 2 libraries can be used with a lot of website development languages - PHP, Python, Perl, etcetera., and support over one hundred widely used image formats which you shall be able to work with - PNG, PSD, JPEG, TIFF, GIF and others.