PixelPen
PixelPen is a free and open-source pixel art editor built with the Godot Engine, functioning as both a Godot addon and a standalone application. It supports GDScript and C++ through a GDExtension plugin, offering tools for pixel art creation and animation.
https://github.com/pixelpen-dev/pixelpenPreview Image

PixelPen: Your Open-Source Pixel Art Editor for Godot
PixelPen is a versatile, free, and open-source pixel art editor developed using the Godot Engine. It's designed to be used both as a Godot addon within the editor and as a standalone application, giving you flexibility in your workflow.
Features and Functionality
This pixel art editor is crafted with GDScript and C++ using a GDExtension plugin, ensuring performance and compatibility. It provides common drawing tools such as selection, shape creation, mirroring, tiling, and animation features. PixelPen is tailored to streamline the creation of pixel art assets directly within the Godot environment.
How to Integrate PixelPen
You can easily integrate PixelPen into your Godot projects by downloading the release version from the Releases page or directly from the AssetLib. The plugin directory should be located at addons/net.yarvis.pixel_pen
. For optimal usage, it's recommended to disable single window mode in the Godot editor. A web demo is also available for previewing some features. Additionally, you can build it from source by cloning the project from GitHub. Be sure to use a pen tablet driver for Windows in your project settings for best results with pen tablets.
Credits and Licensing
PixelPen is developed for the Godot community by Bayu SW and Yarvis Games, with contributions from others. It is licensed under the MIT License, ensuring its free and open-source nature.