I have a few suggestions:
1. Free tools you might like NetVibes, Leftronic and Ducksboard. For creating very simple Data Visualizations.
2. I love (and I mean LOVE) Zapier and the website If This Then That for creating services related to my Data
3. I use Tableau on my Mac for Data Visualization demos. It's very hard to drive but beautiful charts. Visit the Tableau Public page all of charts there are free to use and demonstrate. They are upper right in Gartner and will no doubt be acquired in 18 months by one of the larger players (Oracle, Microsoft, Tibco, IBM Cognos, etc.)
4. A friend of mine works as a designer for Visual.ly who have the most incredible work and offer a build-your-own service.
5. The market is absolutely flooded with DataViz companies of all shapes and sizes (https://angel.co/data-visualization).
6. There is a great youtube video here for an overview the top Big Data players by Pactera. http://youtu.be/77y6lKUnKbo