Recs.
Updated
SpecsUpdate
Pros
Pro Has a fully functional free tier
Codenvy provides a fully functional free tier with 4 GB of RAM and unlimited workspaces, free and public projects and developers. Premium subscription start at $1/month and offers machines with up to 200GB of RAM. Codenvy also offers an on-premises solution that costs $300/user/year.
Pro On-demand, instant-access, real-time collaborative IDEs
Codenvy "Factory" feature enables developers to create temporary IDE workspaces with full code, build, test, deploy, and collaboration functionality that can be shared with a URL. Multiple people can work in the same workspace making code reviews and teaching simpler and faster. And there's no limit to collaborators.
Factories also work with external git repositories and can be shared with not registered users of Codenvy. It also allows counting how much a factory is used.
Pro Powerful editor
Codenvy has a fast, secure browser-based editor that supports syntax highlighting, code completion, refactoring and more. It can be used to edit, build, run and debug projects. It even has multi-cursor support.
The layout will be familiar to most developer, especially those experienced with Eclipse, with a file explorer on the left, code on the right and tabs for builders, runners, terminal and events at the bottom.
Pro Provides a terminal with root access
Codenvy offers a terminal with full root access into the machine. Since machines can be defined with Dockerfiles this gives the ability to create any custom environment for building, running or debuging and all the access that's needed to use it as a local machine.
Pro Can provide a custom runtime environment
Codenvy can provide a runtime environment to test and debug code. This can also be used to share work progress with a client.
Codenvy uses Docker as the runtime application and gives access to Dockerfiles allowing any environment that runs on Linux to be built. This allows using any database, reverse proxy or builder, etc. Codenvy even provides SSH access to running container in every image.
There's also a selection of pre-built environments to speed up the development.