A downloadable tool for Windows and Linux
Lizbox is a free gamedev toolbox for creating pixelart assets.
See what I'm currently working on, report bugs and request features on the Lizbox Discord server: https://discord.gg/a8pfTbR
Animation mask editor
This unique tool lets you create detailed luma masks that work perfectly for pixelart. They can be used with a shader to create some very powerful high performance animation effects. Alternatively you can export animations as pre-rendered images.