From [1]: "Ignite UI is an advanced HTML5+ toolset that helps you create stunning, modern Web apps. Building on jQuery and jQuery UI, it primarily consists of feature rich, high-performing UI controls/widgets such as all kinds of charts, data visualization maps, (hierarchical, editable) data grids, pivot grids, enhanced editors (combo box, masked editors, HTML editor, date picker, to name a few), flexible data source connectors, and a whole lot more."
Although they didn't include any of the data visualization or grid-management components in the open-source version, which makes it a less-performant, more-antiquated and less-functional version of, well, any other similar UI toolkit out there. File under "desperate attempt to stay relevant."
1: https://github.com/IgniteUI/igniteui-react