ImageMagick and GD are 2 of the most popular graphic software libraries available. They make the dynamic creation and editing of images and graphs on an internet site feasible, so they ought to be installed on a web server if you host your sites on it and you prefer to have something different than static images with fixed dimensions. If ImageMagick and GD are set up, you'll be able to edit any image in many ways - generate thumbnails, change the colors, flip it, blur it, and so on. However, these tweaks are possible if the script application that you use on your internet site enables you to perform such things. The 2 libraries could be used with various web development languages - PHP, Python, Perl, and so on., and support over one hundred frequently used image formats which you shall be able to work with - PNG, PSD, JPEG, TIFF, GIF and more.