Ranked in these QuestionsQuestion Ranking
Pro Open source
Piskel is licensed under Apache License, meaning that the user can use the software for any purpose.
Pro Works in any browser
WPiskel is HTML5-based so it works in any modern browser.
Pro Animation support
Piskel includes onion skinning, exporting to sprite sheets or gifs, defining frame rate, and present live playback.
Pro Offline versions available
The downloadable version of Piskel (built with node-webkit) is available for Windows, Linux, and Mac OS X.
Con Limited toolset
Several basic functions, such as mirroring vertically or horizontally based upon your selection, are simply not available in Piskel.
Con Create New still missing
Simple yet necessary option when making lots of projects. Requires you to restart the program for it to start a new project.