Aseprite

Introduction

Aseprite is a program to create animated sprites. Its main features are:

Sprites are composed by layers & frames (as separated concepts).
Supported color modes: RGBA, Indexed (palettes up to 256 colors), and Grayscale.
Load/save sequence of PNG files and GIF animations (and FLC, FLI, JPG, BMP, PCX, TGA).
Export/import animations to/from Sprite Sheets.
Tiled drawing mode, useful to draw patterns and textures.
Undo/Redo for every operation.
Real-time animation preview.
Multiple editors support.
Pixel-art specific tools like filled Contour, Polygon, Shading mode, etc.
Onion skinning

Issues

There is a list of Known Issues (things to be fixed or that aren't yet implemented).

If you found a bug or have a new idea/feature for the program, you can report them.

Support

You can ask for help in:

Aseprite Community
Aseprite Discord Server
Official support: support@aseprite.org
Social networks and community-driven places: Twitter, Facebook, YouTube, Google+, IRC, DeviantArt.

Authors

Igara Studio is developing Aseprite:

David Capello: Lead developer, fixing issues, new features, and user support.
Gaspar Capello: Developer, fixing issues and new features.

Credits

The default Aseprite theme was introduced in v0.8, created by:

Ilija Melentijevic

Aseprite includes color palettes created by:

Richard "DawnBringer" Fhager, 16 colors, 32 colors.
Arne Niklas Jansson, 16 colors, 32 colors.
ENDESGA Studios, EDG16 and EDG32, and other palettes
Hyohnoo Games, mail24 palette.
Davit Masia, matriax8c palette.
Javier Guerrero, nyx8 palette.
Adigun A. Polack, AAP-64, AAP-Splendor128, SimpleJPC-16, and AAP-Micro12 palette.
PineTreePizza, Rosy-42 palette

It tries to replicate some pixel-art algorithms:

RotSprite by Xenowhirl.
Pixel perfect drawing algorithm by Sébastien Bénard and Carduus.

Thanks to third-party open source projects, to contributors, and all the people who have contributed ideas, patches, bugs report, feature requests, donations, and help me to develop Aseprite.

License

This program is distributed under three different licenses:

Source code and official releases/binaries are distributed under our End-User License Agreement for Aseprite (EULA). Please check that there are modules/libraries in the source code that are distributed under the MIT license (e.g. laf, clip, undo, observable, ui, etc.).
You can request a special educational license in case you are a teacher in an educational institution and want to use Aseprite in your classroom (in-situ).
Steam releases are distributed under the terms of the Steam Subscriber Agreement.

You can get more information about Aseprite license in the FAQ.