Lex Soft

I am doing research on chart libraries. There are several ones that are good. FusionCharts and AmCharts are excellent, however I couldn't pick them due to budget constraint to buy them. I only use their free edition for evaluation and comparison to others. So, among free libraries, currently there are 3 that I am making comparison : Chartjs, C3 and ApexCharts. Actually there are others such as...