Charts and graphs are present on various types of sites in order to improve the user experience and show in a easier and more likeable way data for the visitors. These charts and graphs can be created using technologies like PHP, Flash, Javscript (jQuery, MooTools, Prototype) and CSS, but you don’t have to reinvent the wheel unless you have a lot of time at your disposal. What you can do is download and use these following charts and graphs made by ninja developers.