Koding vs Glitch

All languages, databases, and command-line tools are supported. Most machines are already set up with web project basics like Apache, PHP, MySQL, Ruby, Node.js, Perl, and Python and anything else can be installed via the SSH root access.

And link account to oDesk and Facebook.

Koding has a community feature that makes it easy to collaborate and share ideas with like minded developers all over the world. And the community itself is very active and helpful community.

Real-time code and terminal collaboration with integrated chat abilities.

With 256-color support.

Koding supports drag & drop, Dropbox, clone from Github, FTP and the ability to access them using SSH.

The Koding Package Manager (a successor to Apps) is command line tool for installing packages like nginx, Redis, VNC, Wordpress and many others. It consists of officially supported and user-built packages.

Ability to create different sized communities that can be public or private.

There's a built-in social network with developers from all over the world.

Unlimited user-defined domains and subdomains for private or shared VMs can be set up.

Koding uses the Ace editor that's developed by Cloud9. Besides the basics, it covers most important advanced code editor features such as code folding, converting cases, auto-completion, code analysis and refactoring, regex search and offers easy access to relevant documentation.

It also gives access to the CLI, has support for Vim and Emacs keybindings, includes multiple cursors and zen coding mode that removes all distractions and allows focusing on code.

Perfect for building web applications, be it client-only, server-only, or full stack.

Non-collaborators can't access private data (e.g. API keys) which are stored in a special file, and they are deleted when a project is forked.

Although the only official language/framework is Node.js, you can access the terminal and install other languages via apt-get (as long as it doesn't exceed the storage limit).

If you feel the built-in web editor is not sufficient, you can switch to VS Code and get the full power of its plugins. You still work with the files and server in the cloud, no extra setup required.