Mr. Data Converter
Will convert your Excel data into one of several web-friendly formats, including HTML, JSON and XML.
DataWrangler
A fantastic tool developed by the Stanford Visualization Group for wrangling and cleaning up your data into a format that can be interpreted by Tableau, R, etc.
If you wish to build a visualization from the ground up, you can use the Java programming language to build an applet, or software such as Adobe Flash. Below are some resources that may help you develop a data visualization with a programming or scripting language.
Learning the Java Language
The basics of Java, an object-oriented programming language.
20 Fresh JavaScript Data Visualization Libraries
Use a combination of HTML 5, JavaScript and jQuery to build visualizations.
Cartagen
Cartagen is a vector-based, client-side framework for rendering maps in native HTML 5. Written in JavaScript, it uses the new Canvas element to load mapping data from various sources, including OpenStreetMap.
Tableau
Free data visualization tool.
Gapminder
At Gapminder World, you can view preloaded data using their visualization software.
Open Street Map
OpenStreetMap allows you to view, edit and use geographical data in a collaborative way from anywhere on Earth.
