Placehold.it - Quick and simple image placeholders. Rundeck.org - Open Source Automation. Bootstrap, from Twitter. 10 Excellent HTML5 coding Tools Many Users Don’t Know About. HTML5 will radically change the way we make websites and web apps.
So here are 10 great tools that are amazing for simplifying and enhancing HTML5 coding. Initializr If you are just going to start with a HTML5-based website, then visit Initializr to get started.