A resource for working with Charts and graphs. Mostly a compendium of libraries and third party integrations.
Charts.module
A drupal module with API that supports High Charts and Google Charts libraries. Views integration
project/
code: https://www.drupal.org/project/charts
docs: https://www.drupal.org/node/2423033 + https://www.drupal.org/node/233753
examples:
Google Charts
docs: https://developers.google.com/chart/interactive/docs/index
examples: https://developers.google.com/chart/interactive/docs/gallery
Charts.js
6 chart types
nice animations; very tin js, leverages HTML5 canvas + cross platform fallback
project: http://www.chartjs.org
code: https://github.com/nnnick/Chart.js
docs: http://www.chartjs.org/docs/
examples:
D3
good for inventing things
...
free for non-profits
supports line, spline, area, areaspline, column, bar, pie, scatter, angular gauges, arearange, areasplinerange, columnrange and polar chart
also maps with touch support support.
Highcharts has recently put a lot of work into making their charts more accessible!
project: http://www.highcharts.com
drupal module: https://www.drupal.org/project/highcharts
https://www.drupal.org/project/charts
code: https://github.com/highslide-software/highcharts.com
docs: http://www.highcharts.com/docs
examples: http://www.vitalsigns.mtc.ca.gov/transit-ridership#chart-2
http://www.highcharts.com/demo
http://www.highcharts.com/maps/demo
Charts.module
A drupal module with API that supports High Charts and Google Charts libraries. Views integration
project/
code: https://www.drupal.org/project/charts
docs: https://www.drupal.org/node/2423033 + https://www.drupal.org/node/233753
...
Resources
http://www.sitepoint.com/15-best-javascript-charting-libraries/