Serial Studio includes several visualization options, including raw line graphs, bar/level indicator, dial indicator, the artificial horizon for IMU data, or a map widget.

FusionCharts supports both JSON and XML data formats, and you can export charts in PNG, JPEG, SVG or PDF. They have a nice collection of business dashboards and live demos for inspiration.

It also has a "totals" data structure which contains the total counts for each candidate. I wrote a Python script that will retrieve the election data from S3 and parse it with the simplejson library.