Based on our record, Tahoma2D seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Https://tahoma2d.org/ -- Probably best all around updated version with enhancements. Source: over 1 year ago
These are leaning more on the compositing side, but some features might replace those in AE pretty well, especially in case of Blender. Let me know if you were looking for something more on the animation side of things (well, I'm going to say Blender there as well, so let's not bother; however the only ones except Blender I'd recommend, are 2D-based, like Tahoma2D, a more pleasant tool than OpenToonz imo. It's... Source: about 3 years ago
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
OpenToonz (Morevna Edition) - Free and open-source 2D animation software for Windows, Linux and OSX
Synfig Studio - Just another WordPress site
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Toon Boom Harmony - Production-ready animation software for every artist, in any style.
Pencil2D - Pencil2D is an opensource animation/drawing software for Mac OS X, Windows, and Linux, based on old...