Freemium Construc 2 is a Windows-based visual editor that allows users to create HTML5 games without any coding experience. The software is the brainchild of the Gullen brothers and their London-based company, Scirra. The free version restricts some project management features and only allows exports to HTML5, but provides more than enough freedom to quickly make engaging games
Although not entirely focused on only coding, this resource provided by WordPress offers some excellent tools in the languages of HTML, CSS and others.
"Play My Code is an online platform for building, playing and distributing browser games. Powered by HTML5, you can build within the browser and embed your games anywhere."
"Tynker is a new computing platform designed specifically to teach children computational learning and programming skills in a fun and imaginative way. Tynker is inspired by Scratch from MIT. It is a completely browser-based implementation written using Open Web standards such as Javascript, HTML5, CSS3 and does not use Flash."
"WebKit is an open source web browser engine. WebKit is also the name of the Mac OS X system framework version of the engine that's used by Safari, Dashboard, Mail, and many other OS X applications. WebKit's HTML and JavaScript code began as a branch of the KHTML and KJS libraries from KDE."
Apart from the not-so-common transition effects, this slideshow also has autoplay options (that stops itself when you hover over it), caption and pagination support. It also supports html elements and videos.
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