Eclipse Che vs JSFiddle

You can choose from pre-configured environments for Java, Javascript, C++, PHP, C#, etc... or you can define your own by dropping in a Dockerfile - makes it easy for simple and complex projects.

I like that I can package up custom commands with my workspace and then use them (or share them) with everyone else.

Built-in terminal with root access so I can make changes to my running machines. Although I don't use it often being able to SSH into the workspace so I can use a desktop IDE is handy.

The workspace in Che includes project sources, IDE and the runtime. So if you hand your Che workspace definition to another user and they execute it they will get everything they need to build, run and debug the project.

Also the runtime is in a Docker container so it will work even if the second user is on a different OS than the original user who shared their workspace with them.

Che does a nice job to automatically map the service:port running in my Docker container (e.g. tomcat on 8080) to the Docker port it actually uses (something in the ephemeral range). I never need to figure that out - it's just made available to me when I run my server.

Projects can be easily imported from any Git or Svn repository hosting service.

In addition to supporting JavaScript and CSS, language settings can be switched to CoffeeScript and SCSS.

JSFiddle makes it easy to save the code snippets and send the link to others who can view and edit the code.

JSFiddle can switch to selection of frameworks and extensions including jQuery, AngularJS, ReactiveJS, D3 simply from a dropdown.