Specifically I want to make a collage of many pictures. For that purpose the software should be able to handle many large pictures, and align them relative to each other (snap center to center, etc)
I’d like to avoid having to do it in libre office if at all possible.
Is there anything like that?
Scribus is an excellent libre desktop publishing program.
I used to write a small postcard game for the “Wish you were here” jam, but it is suited to any job up to professional level.