Blender: If you're interested in 3D modeling or Animation
Inkscape: If you have any need for a vector graphics program thats a bit like Adobe Illustrator
OBS: If you need to do any screen recording or livestreaming
Haruna Video Player: It plays videos and can also play youtube videos if you paste in a link. (This also pulls in yt-dlp as a dependency, which allows you to download youtube videos and the like from a terminal)
btop: A nice looking system resource monitor that runs in a terminal