A picture says more than a thousand words..but what exactly do you want to visualize?
I have seen a lot of examples of very good but also very bad visualizations. For example a pie chart with more than 3 or 4 categories is not readable in my opinion. Because people are better at comparing lengths than areas, a bar chart is a better choice in many cases. I am using rainbow colors only occasionally since there is no “greater than” ordering in colors so it’s hard for a human to compare quantitative data. Until now I have used R/shiny, D3js, plotly, QlikView and Tableau for my data visualizations with most experience in the first 2.