On Linux I like to use: https://github.com/pdfarranger/pdfarranger for such tasks. - Source: Hacker News / 10 months ago

I see some questions in the comments about document splitting and if you are using PDF for the export in scanning, this adds an extra step but may be valuable in the long run. For Linux users at least, there is "pdfarranger" which most distros have. You can install that, load the PDF and re-arrange pages, remove pages, etc. Source: 12 months ago

I like PDF Arranger for converting JPEGs to PDFs (open source on Windows) https://github.com/pdfarranger/pdfarranger. Source: about 1 year ago

I have always only been using PDF Arranger for manipulating PDF files (merging different files, arranging, adding, deleting pages) and I'm wondering if there really is no KDE equivalent for that application. Source: about 1 year ago

For merging, check out PDF Arranger. If you need to turn those emails or anything else into pdf, you can use any pdf print driver, and then put it all together with pdf arranger. For the stamps, LibreOffice Draw should do the trick. It won't be an automatic one click type of thing like I'm guessing it is in Adobe, but it's free. Source: over 1 year ago

NAPS2 is a great tool for just scanning images in. It's got a simple UI, a fair amount of customization, and a handful of basic editing features built in (one of which is an automated deskew). Source: over 1 year ago