Isometric Game Art Pack - Extensive library of game art for indie devs
Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
Sketch This - Daily drawing challenges
Lucidpress - Lucidpress is a web-based design and layout application that enables anyone to create beautiful...
IsometricSass - Make isometric 2D objects without Javascript
Piktochart - Piktochart for Business Storytelling