This document summarizes two JavaScript data visualization frameworks: the JavaScript InfoVis Toolkit and PhiloGL. It describes that the JavaScript InfoVis Toolkit provides a wide range of visualizations and is focused on performance with support for browsers, devices, and mobile platforms. It also notes that the toolkit is used by organizations like the White House, Mozilla, and Google. The document then introduces PhiloGL as a WebGL powered framework for large datasets with an idiomatic JavaScript API and module system. It provides examples of both frameworks.