master branch hosts iXMaps 0.9. Version 0.9 is a release candidate for the iXMaps thematic mapping framework.
The iXmaps vector layer is usually displayed on top of a HTML Tile Map powered by Leaflet.
iXMaps provides a high-level visualization grammar for thematic maps. It defines a concise JSON syntax for supporting rapid generation of visualizations from raw data.
Try using iXmaps with your own data in the online Theme Configurator.
If you need test data, you find some in a dedicated ripository gjrichter/data. To use this data you can define a raw url with https://raw.githubusercontent.com/gjrichter/data/master/ + dataname.csv