Shell frontend for the LaTeX pdfpages package for mingling PDFs. More information: https://github.com/rrthomas/pdfjam.
pdfjam path/to/file1.pdf path/to/file2.pdf --outfile path/to/output_file.pdf
pdfjam files... 1 --outfile path/to/output_file.pdf
pdfjam path/to/file1.pdf 3-5,1 path/to/file2.pdf 4-6 --outfile path/to/output_file.pdf
pdfjam path/to/file.pdf path/to/signature --fitpaper true --outfile path/to/signed.pdf --nup "1x2" --delta "0 -842pt"
pdfjam path/to/file.pdf --nup 2x2 --suffix 4up --preamble '{{\usepackage{fancyhdr} \pagestyle{fancy}}}'
pdfjam files... last-1 --suffix reversed