Visualizing data in form of colorful graphs makes data look interesting and easy to comprehend and if you animate then it's like icing on the cake.
FusionCharts is the name that comes in mind when we talk about cool animated chart and graphs. FusionCharts library has been in market for years and has been very successful in this area. There are many big companies who use their product but along with paid product FusionCharts also provide a free open source version of the library it's known as FusionCharts Free. You can use this library for both personal and commercial use. [More]