Bit - Animation Editor is finally out! Check it out it over here:
https://store.steampowered.com/app/1370650/Bit__Animation_Editor/
We're live right now, making some art, so come join us! =D
Bit is an art tool with powerful export options, used to compose and design animated pixel art! It concentrates on composition design and simpler mechanical animations like tweening/easing. Moreover, we have a Unity importer available for it.
And here's a link to the manual, where you can learn everything you need to get started. You can for example read about how to create a new project here.
Take care! <3
//Morgondag