Choose a Code Editor
Once OpenFL has been installed, it is helpful to choose an integrated development environment (IDE) with good support for Haxe and OpenFL development.
Although you can write code using even a simple text editor, a quality IDE can provide code completion (code hints), shortcuts to build and test your projects, and other tools to give you a great coding experience.
FlashDevelop is one of the strongest IDEs for Haxe and OpenFL development. If you are a Windows user (and perhaps if you are not), we recommend that you try FlashDevelop first to get a feel for what an integrated environment looks like. Many developers prefer FlashDevelop.
OpenFL includes FlashDevelop project files when you use the "openfl create" command for convenience. FlashDevelop is free and open-source.
Unlike FlashDevelop, Sublime Text does not provide accurate code completion, nor does it support "projects" in the traditional IDE sense. However, Sublime Text is much stronger than a simple text editor, and is a good recommendation for macOS and Linux users.
Sublime Text is free-to-use, with reminders to pay for continued use.
IntelliJ IDEA is primarily marketed as a Java IDE, but it has growing support within the Haxe community, including large teams, such as TiVo. The full edition, as well as the free community edition, support the Haxe plugin, which is not easy to install, but can provide a fuller native IDE experience for macOS or Linux users.
Visual Studio Code
Visual Studio Code (or vscode) is an extensible code editor. There is active development on extensions for Visual Studio Code that adds support for the Haxe language, leveraging the Haxe Language Server. This provides accurate code completion. After installing make sure you install the Haxe extension pack.
There are other code editors to choose from, include vim and up-and-coming Haxe-based editors. You can read more at https://haxe.org/documentation/introduction/editors-and-ides.html