Unity - The multiplatform game creation tools for everyone.
PhotoPenguin App - PhotoPenguin is a completely free batch photo editor with support for cropping, resizing, adding watermarks, and converting photos to other formats. It works on the user's device, using the capabilities of modern browsers.
Godot Engine - Feature-packed 2D and 3D open source game engine.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats