imMens is a system that supports real-time interactive exploration of datasets consisting of millions or more data points. The implementation is based on techniques described in the following publication:
"imMens: real-time visual querying of big data"
Zhicheng Liu, Biye Jiang and Jeffrey Heer
http://vis.stanford.edu/papers/immens
Documentation of system API and usage: https://github.com/uw-data/imMens/wiki.
This tool is developed by Zhicheng Liu (zcliu@cs.stanford.edu) and is distributed under the BSD-3 license.