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

GraPHPite
	https://graphpite.sourceforge.net/

JpGraph
	https://www.aditus.nu/jpgraph/

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

pChart
	https://pchart.sourceforge.net/

TeeChart
	https://www.steema.com/products/teechart/overview.html

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