Isometric Game Art Pack - Extensive library of game art for indie devs
Kandinsky.io - Abstract image generator
Isometric - Create beautiful, abstract works of art & optical illusions
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
Sketch Isometric Plugin - Generate isometric views from artboards and rectangles
Indie Boost - A video game discovery software used by Publishers, Press, YouTubers, and Streamers.