A high performance WebGL/JS heatmap display library
...The library focuses on visual quality, producing anti-aliased, blur-free gradients that look good at various zoom levels and resolutions. It fits well into data-viz stacks where you need a responsive heat layer on top of maps, charts, or custom canvases, and it is compact enough to embed in dashboards and demos without heavy dependencies.
Open source JavaScript renderer for Kartograph SVG maps
kartograph.js is an unmaintained open-source JavaScript library that renders interactive SVG maps in browsers, using jQuery and RaphaelJS. Originating from Kartograph.py, it supports map loading, stylable layers, choropleth maps, symbol overlays (e.g., bubbles), and allows chunked rendering for complex maps.