Simple Python script to shuffle a PDF file such that it takes the first and last page of the current iteration and appends them to document, for instance 1 2 3 4 5 becomes 1 5 2 4 3. This would be useful when scanning a double-sided document.
Either clone the repo and install PyPDF4 (pip install pypdf4), or download one of the executables from the releases page. Then run it like so:
$ python pdf-scan-merger.py .\path_to_source.pdf --out .\optional_path_to_output.pdf$ pdf-scan-merger.exe .\path_to_source.pdf --out .\optional_path_to_output.pdf