Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
GraphicsJS - Free open-source JavaScript library for easily drawing HTML5 graphics and animation.
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.
altcanvas - Altcanvas is a project for developing a new and more intuitive GUI framework for handheld devices.
Adobe InDesign - Adobe InDesign is a desktop publishing software application.
Paper.js - Open source vector graphics scripting framework that runs on top of the HTML5 Canvas.