Grafx2
Piskel
Aseprite
Pixen
Pyxel Edit
Pixelorama
VistaCreate
IconLover
TextureLab
Material Maker
Substance Designer
PixaFlux
Filter Forge
Substance Alchemist
TextureWorks
TexGraph
Piskel - Piskel is a website where designers online create sprites or pixel art.
Material Maker - Cross-platform, procedural texture generation tool.
Aseprite - Aseprite is an art program dedicated to the creation of pixel art.
Substance Designer - Substance Designer is a node-based non-destructive application for material authoring.
Pixen - Pixen is a professional pixel art editor designed for working with low-resolution raster art, such as those 8-bit sprites found in old-school video games.
PixaFlux - PixaFlux is a node based image processing application.