ChartDirector
	https://www.advsofteng.com/cdphp.html

GraPHPite
	http://graphpite.sourceforge.net/

JpGraph
	https://jpgraph.net/
	Used composer packages:
        https://packagist.org/packages/jpgraph/jpgraph (\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph)
        https://packagist.org/packages/mitoteam/jpgraph (\PhpOffice\PhpSpreadsheet\Chart\Renderer\MtJpGraphRenderer)

LibChart
	https://naku.dohcrew.com/libchart/pages/introduction/

pChart
	http://pchart.sourceforge.net/

TeeChart
	https://www.steema.com/

PHPGraphLib
    http://www.ebrueggeman.com/phpgraphlib