SVG Backgrounds - Customize, scalable backgrounds and patterns for free
Aseprite - Aseprite is an art program dedicated to the creation of pixel art.
Svg Wave - A tiny, customizable svg wave generators for UI Designs.
Pixel Art Studio - A purpose-built drawing tool for pixel artists
Get waves - A simple web app to generate svg waves, unique every time
Piskel - Piskel is a website where designers online create sprites or pixel art.