Screenshots of ntfy.sh

Features of Glaxnimate

Customizable Interface
Dark and Light UI themes Icon themes Dockable views
Smooth Animations
Vector graphics and tweening animations
Cross Platform
Download for GNU/Linux, Windows, and Mac
Animations for the web
Lottie animations Animated GIF and WebP Animated SVG
Easily Extensible
You can use Python to manipulate animations and create plugins.

Screenshots of Glaxnimate

Screenshots of Yet Another Mi-FreeForm (Squared)