BONUS: here's some command-line toys that are not useful or necessary, but are just real fun to take a look at especially if you're new to linux:
- cmatrix (does the matrix code rain thing)
- cowsay (ascii cow with speech bubble)
- sl (steam locomotive in your terminal)
- cbonsai (generate bonsai tree)
- neofetch (this one is actually very useful and will print system information in an aesthetically pleasing way)
Here's some creative software that replace the functionalities of Adobe software & more.
if there's any other specific software you're looking for a FOSS alternative to, don't hesitate to ask. You always have more options on Linux than you'd think.