Visualizations: Comparing Tableau, SPSS, R, Excel, Matlab, JS, Python, SAS

Are are asked to identify which tool was used to produced the following 18 charts: 4 were done with R, 3 with SPSS, 5 with Excel, 2 with Tableau, 1 with Matlab, 1 with Python, 1 with SAS, and 1 with JavaScript. The solution, including for each chart a link to the webpage where it is explained in detail (many times with source code included) can be found on a linked page if you are a Data Science Central member.