coppercube 3d all the way for me
gimp for image editing
blender3d for modeling and animation
LMMS for tunes
i use game sound generators most often for soundsfx

I've made a cool prompt generator, this is helping me a lot to make games with new ideas that I would have never thought about! Here is the link -> Random Theme Generator

• Unity
• Using lots of scriptable objects
• Using a MessageBus like https://github.com/KLab/klab-messagebuses-unity to facilitate component <> component communication
• e.g. UI events
• Aseprite for pixel art, easily able to just edit the files and have the changes automatically import to Unity
• Audacity for sfx 
• Visual Studio for C# development
• OBS for screen recordings. Take screenshots from the video and can convert the output to GIF if need-be

Basic but gets the job done :) 

GIMP - an old favorite of mine

OpenCanvas

Audacity - good program for sound.