Here is list of editors that you can use to develop Keras.
The steps to setup each of them is provided.
Welcome to reply to this topic to add more.

GitHub Codespaces
This is the easiest option. It helps you setup the environment with one click.
You can click “Code → new codespace” on your fork’s web page to open it in GitHub Codespaces 15.
You can start coding and running the tests there right away.
However, Codespaces is only available in beta. You need to request early access to use it.

Visual Studio Code
This is also an easy option for beginners.
Clone your fork of the repo to your computer.
Open Visual Studio Code 2.
Install the Remote-Containers extension 8.
Open the cloned folder and click “Reopen in Container” in the popup notification.
You can start coding and running the tests there right away.