http://bl.ocks.org/robschmuecker/7880033 - D3.js drag-and-drop tree https://github.com/d3/d3/blob/master/API.md - D3.js API reference (hub)
https://reactjs.org/tutorial/tutorial.html#overview - React tutorial https://reactjs.org/docs/react-api.html - React top level API
https://github.com/emeeks/d3_in_action_2 - D3 in action repository https://github.com/emeeks/d3_in_action_2/tree/master/chapter9/reactd3 - sample React + D3 dashboard
https://medium.com/@Elijah_Meeks/interactive-applications-with-react-d3-f76f7b3ebc71 - example of react + D3.js
https://blog.416serg.me/building-an-app-using-google-sheets-api-react-d69681d22ce1 - combining Google spreadsheets with React
https://www.balbooa.com/knowledgebase/32-documentation-faq-joomla/176-how-to-add-custom-font-to-website-through-fontface https://www.fontsquirrel.com/tools/webfont-generator https://www.whatsmyip.org/html-characters/