ImageMagick and GD are two of the most frequently used graphic software libraries available. They make the dynamic creation and editing of images and graphs on an internet site doable, so they ought to be available on a web server if you host your websites on it and you prefer to have something different from static images with fixed dimensions. If ImageMagick and GD are set up, you will be able to edit any image in various ways - create thumbnails, change the colors, flip it, blur it, etcetera. Naturally, these tweaks are doable if the script application which you employ on your website enables you to perform such things. The 2 libraries can be used with many website development languages - PHP, Python, Perl, and so forth., and support over one hundred frequently used image formats that you shall be able to work with - PNG, PSD, JPEG, TIFF, GIF and others.