

Blender for 3D modeling, sculpting, animation, rendering and (simple) video editing.
Several movies were either made (almost) entirely with Blender (Flow, Next Gen), or in parts (e.g., Captain America: The Winter Soldier, SpiderMan 2, The Midnight Sky).
It is also used by many (indie) game devs.
Speaking of games: Godot is an awesome 2D/3D game engine, which gained a lot more momentum after the Unity fuck-up. It’s licensed under the MIT license. Among a plethora of smaller indie games it has been used for financially successful and/or popular titles by indie and non-indie devs alike such as Brotato, Cassette Beasts, RPG in a Box, Endoparasitic, Dome Keeper, Sonic Colors: Ultimate, and several more.
Give it a try if you’re into game development!
Brainstorming. ChatGPT and co. are slightly better rubber ducks. Which helps to sort my thoughts and evaluate ideas.
Also when researching a new topic I barely know anything about, it helps to get useful pointers and keywords for further research and reading. It’s like an interactive Wikipedia in that regard.