Brush Ninja

Brush Ninja is a free and simple application for making animated GIFs. The site indicates that “Brush Ninja is free to use with no accounts, login, or tracking done.” The app will run on any Web browser and work with desktop and mobile devices.

To make an animated GIF it is as simple as drawing on a blank scene editor. After drawing multiple scenes to create the GIF, the user presses play to preview the animation with the ability to easily make edits.

https://brush.ninja/