Zero dependency library to provide some basic geo functions
xy coordinates of a textarea or input's caret
A very fast geospatial point clustering library for browsers and Node.
A d3-based parallel coordinates plot in canvas. This library is no longer actively developed.
Captures mouseclick and displays its coordinates with easy way to copy them.
A polygon Google maps tool that outputs the given coordinates of each polygon angle. You can create additional angles, but must have no less than 3. The purpose is for real estate mapping.