Are there any open source map platforms like this for integrating into real time data feeds (i.e. if we want to track sales by region etc...) onto a map?

I know about http://cesiumjs.org/ but it was extremely resource intensive heavy last time I tried to use it.

EDIT: it looks like they use http://leafletjs.com/ -- looks interesting

There's this https://github.com/hrbrmstr/pewpew it's as much a criticism of these sorts of security visualizations as it is a means to create them.