Vector Art
Drawing app with editable graphics that retain quality when scaled. Supports both PC and mobile. Note: Similar to WallDraw, but much more data efficient owing to the use of instancing with WebGL.

Hexel Art
Drawing app with hexagonal grid as the canvas. Each hexagon is called a hexel (analagous to pixel). Supports both PC and mobile. See blog post for screenshots. Note: My first experience working with WebGL, TypeScript, XSD, npm, and gulp.