The 'rAmCharts4' package as a whole is distributed under GPL-3 (GNU GENERAL PUBLIC LICENSE version 3).
It includes other open source software components. The following is a list of these components:
- amCharts, https://github.com/amcharts/amcharts4/
- SuperTinyIcons, https://github.com/edent/SuperTinyIcons/
- regression-js, https://github.com/Tom-Alexander/regression-js/
Full copies of the license agreements used by these components are included in the file LICENSE.note.