add chart.xkcd to charts

Author: moklick

README.md

@@ -111,6 +111,7 @@ A continuously expanded list of frameworks, libraries and tools I used/want to u
 - [chartist](http://gionkunz.github.io/chartist-js/) - Simple responsive charts
 - [charts](https://github.com/frappe/charts) - SVG Charts with zero dependencies
 - [chartjs](http://www.chartjs.org/) - Simple, clean and engaging charts for designers and developers
+- [chart.xkcd](https://timqian.com/chart.xkcd/) - Chart library for "sketchy" or "cartoony" styled charts
 - [Cytoscape.js](http://js.cytoscape.org/) - Graph theory / network library for analysis and visualisation
 - [c3](http://c3js.org/) - D3-based reusable chart library
 - [dc](http://dc-js.github.io/dc.js/) - For heavy amounts of data