Heatmap
Heatmap generates customizable heat maps, charts, and statistics to visualize date-based activity and trends. It uses color shading in calendar blocks to indicate intensity – lighter colors for less activity, darker colors for more.
Heatmap is based on Heat.js, a third party Javascript library (https://github.com/williamtroup/Heat.js)
Heat.js supports 4 different views: Map, Chart, Days, and Statistics.
There are more than 50 language translations built-in.
The Heat Map extension can Load data from MySQL, CSV, MS Access (MDB) or JSON