Material Maker
Procedural textures authoring tool
TexGraph
Procedural Texture Creation Tool
Xmas Tree Designer (PC)
A fun, child-friendly Christmas tree designer for home or school.
Aischylos
Game Design tool that helps you plan your game, characters,layouts and dialogs.
TextureAtlasComposer
Utility for creating and editing texture atlases
Shader Motion Graphics™
Design graphics & animations for real-time rendering
Rubik's Snake Designer (Rubik's Twist)
3D virtual Rubik's Snake/Twist simulator with customization and more (made in Godot)
Geeonx
crossplatform GUI and GUI Designer
HxPatternDesigner
Substance 3D Designer but for free
La Perilla
The tool to develop AGD games on Zx Spectrum outside the Zx Spectrum
Tk designer
Tk Designer is a visual user interface programming tool in Python (Tkinter).
Pixel Font Designer
Create your own (.fnt) Pixel Fonts with this Software Tool
Sprite Designer
Procedural Art Designer