gimp is the tool of choice for many folks who want to keep everything as digital as possible. filling out and signing pdfs with gimp seems pretty common practice these days. a feature that would really help with this is the ability to 'print layers as pages'.

when a multi page pdf is imported into gimp, it is done as layers. you do your edits, and then generally you have to print each layer to a pdf and merge them when you are done. for pdfs with many pages, this can quickly become a major time drain. an option to 'print layers as pages' would be immensely more efficient in these cases, and for many folks would negate the need for 3rd party convert programs.