Adobe Character Animator is described as 'Create a character and animate it with your own performance. Adobe Character Animator (formerly Character Animator CC) uses your expressions and movements to animate your characters in real-time. So when you smile or nod your head, your character does, too' and is an app in the file sharing category. There are three alternatives to Adobe Character Animator for Linux, Windows, Mac and Online / Web-based. The best alternative is Synfig Studio, which is both free and Open Source. Other great apps like Adobe Character Animator are enve and Expressive Animator.
Synfig is a free and open-source, industrial-strength, vector-based 2D animation app designed for producing feature-film animations. It eliminates the need to create animations frame by frame. It is available for Windows, Linux, and macOS.
Synfig Studio vs Adobe Character Animator opinions
pros, cons and recent comments
it is so simple to learn, and very good software if you are new in animation :)