I use only 3, eh... mostly 2?, tools for the little animations:
I use this for modeling & animating
I use this tool to make things like fire, water, and animated textures.
After modelling and animating in Blockbench, I export the whole thing to a Blender scene if I want to make it have lights and shadows.
Although, I'll be real, I wish it didn't take 2763 years for a 3 minute video :')
Some other things I know how to use include, but aren't limited to:
Davinci Resolve
Krita
Photopea
Turbowarp
MS Paint