Try FlowmapBlue for an easy way of publishing flow maps backed by Google Sheets (no coding required).
Flowmap.gl belongs to the Vis.gl family.
The project has been developed and maintained by Ilya Boyandin (originally at Teralytics).
Thanks to Philippe Voinov for the help with the first version of
FlowLinesLayer, to Nikita Rokotyan for the advice on
AnimatedFlowLinesLayer, to Xiaoji Chen for her help with deck.gl, and to other contributors.