Open Source C++ Graphic Design Apps for Android

ImageMagick® is a free and open-source software suite for displaying, converting, and editing raster image and vector image files. It can read and write over 200 image file formats, and can support a wide range of image manipulation operations, such as resizing, cropping, and color correction. ImageMagick is written in C and is available for a wide range of operating systems, including Linux, macOS, and Windows. It can be used as a standalone application, or as a library that can be integrated into other software programs. Overall, ImageMagick is a powerful and versatile software suite for displaying, converting, and editing image files. Its support for scripting and automation, along with its other features, make it a valuable tool for a wide range of image-related tasks.

See https://www.openorienteering.org/apps/mapper/

NavitConfigurator is an editor for configuring the open source navigation program Navit. It supports Andoid devices to test the result directly.

Кроссплатформенный графический растровый редактор для бытовых, технических, учебных набросков и схем с поддержкой слоёв и прозрачности. Видеоуроки: https://rutube.ru/plst/321587