Assets for editing animations directly inside Unity?

I’m making a relatively simple game in terms of my animation requirements, in that I can use a lot of the generic animations I find, but sometimes I find I would really like to make some very small tweaks.

I remember seeing some demos on youtube some years ago of people editing animations directly inside Unity, instead of going through an external tool like Blender.

There’s UMotion Community - Animation Editor as a free animation editing asset, and it already is a great one. Some more features are in the UMotion Pro, I really suggest it if you feel the UMotion Community is the right asset for you.