Aseprite is a pixel art tool that lets you create 2D animations for videogames.

Key featuresCompose sprites using layers & frames as separated concepts Create images in RGBA or Indexed color modes Open/Save GIF animations, sequence of PNG files, etc. A timeline where you can copy/move layers, frames, or specific images Animation tools: Real-time animation preview, onion skinning, tag frames Pixel art tools: shading, pixel perfect strokes, RotSprite rotation, tiled mode, filled contour Export/import sprite sheets A command line interface to automate conversion and sprite sheets generation Updates for the whole v1.x series up to v1.9.