jsFiddle is described as 'JSFiddle is an online IDE service and online community for testing and showcasing user-created and collaborational HTML, CSS and JavaScript code snippets, known as 'fiddles'' and is a very popular Code Editor in the development category. There are more than 50 alternatives to jsFiddle, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Self-Hosted apps. The best jsFiddle alternative is CodePen, which is free. Other great sites and apps similar to jsFiddle are Replit, Pastebin.com, JSPad and Ideone.
Storm is an online web development environment which allows users to run HTML, CSS, Javascript code in real time in a secured environment. It supports sharing Scribble (Storm project) via a dedicated link and also allows users to use jQuery and React framework of JavaScript.
Its about quite a few things. You can use CSSDeck to make testcases and share with other people on IRC, forums, StackOverflow, etc. who help you solve your coding problems. You can even code with multiple people in realtime in various modes. Remember etherpad ?
An online playground with an instantly ready coding environment that supports several language preprocessors, CSS, HTML and JavaScript.
Codeply is a editor that lets you run and preview your HTML, CSS and JavaScript code from any modern Web-browser. You've seen this capability in other tools like JSFiddle, Codepen and Bootply. But, Codeply is different because it's not just a code editor.
Test HTML / JavaScript / CSS snippets with real-time preview. You could also add libraries (jQuery, YUI etc.).
CodeBunk provides a Realtime Collaborative Editor with Compile/Run. CodeBunk is an Online Compiler/Interpreter for PHP, Python, Ruby, Perl, Lua, Javascript, C, C++. CodeBunk also has Peer-to-Peer Video/Audio chat facility.
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Includes built-in code snippets and examples