Datawrapper is a chart, graph, and map-making tool designed specifically to help journalists create clear, aesthetically appealing visuals. scout 
One of two types of maps that can be made from uploaded data. page
However, this tool is also useful for anyone looking to publish or embed data visualizations easily. Data may be added by either copying and pasting a Microsoft Excel document or by uploading a csv file.
Datawrapper instantly creates a variety of charts. Users can select the chart that best presents their data, then add labels, change colors, and adjust the size of the chart.
Users can download their charts, graphs, or maps as a Portable Network Graphic (PNG) for free. For a monthly fee, users can embed charts in websites.
Here you can see some of the nice charts that Datawrapper users have created so far. Click on the charts to see the interactive version. page
It draws inspiration from ManyEyes and GoogleCharts but remains entirely open-source and independent from a third-party server. github