Cycloid Drawing Machine - A mesmerising spirograph-like web app
Isometric Game Art Pack - Extensive library of game art for indie devs
scri.ch - A hackable drawing tool. Draw. Save. Share URL.
Isometric - Create beautiful, abstract works of art & optical illusions
Magic - Get whatever you want on demand with no hassle, through SMS
Sketch Isometric Plugin - Generate isometric views from artboards and rectangles