As explained, Cloud9 comes with an Integrated Development Environment. The languages supported here are:
- C++
- C#
- CoffeeScript
- CSS
- Dart
- Go
- Haskell
- HTML
- Java
- JavaScript
- Node.js
- PHP
- Python
- Ruby
- Shell script
Please keep an eye on the official documentation (https://docs.aws.amazon.com/cloud9/latest/user-guide/language-support.html) for any newly added languages.