Java has the most commits made by open source developers, followed by HTML, C, PHP, Ruby… (Scala, Clojure and Groovy are not visible in the graph).
It seems like Java is not only the most popular language, but also the most used language for OpenSource development [according to: http://www.ohloh.net].
Web Apps, SPA, PWA with vanilla Java Script (ES 6+), CSS 3 and WebStandards only. As simple as possible, but not simpler. See you at: (Progressive) Web apps, Single Page Apps and WebStandards airhacks workshops at MUC airport, Winter Edition
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