While the name implies it’s used to represent timelines, amCharts 4 TimeLine is useful everywhere, where you need to dazzle your users with a uniquely shaped chart.
TimeLine is an add-on to the amCharts 4 package. While the amCharts 4 JavaScript dataviz library is very flexible and customizable by itself, TimeLine ads another dimension and lets developers and designers implement uniquely shaped timeline charts.
I work with the team at amCharts (not on the TimeLine product though) and was completely mesmerized when they showed me the demos of TimeLine. Check it out for yourself.
Diagrams by marker.js