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Re:Linux Productivity Tools (2019) [pdf] by joyj2nd on Tuesday May 19, 2020 @07:50AM (#23233803)
1. Xournal to annotate PDFs (aka sign contracts without printing them and scanning them back).

Will check it out. For PDFs I mostly use Master PDF Editor

2. LibreOffice of course for most document related work

For me LibreOffice is a bad nightmare. I use the commercial Softmaker.

6. pdfsandwich and Tesseract OCR for OCR/turning PDFs into searchable files

Good luck with that. My results with Tesseract were always abysmal. I use ABBYY Finereader with wine. I would pay for a native Linux version. They have a Linux command line tool that has a biblical price tag.

12. Inkscape for messing around with vector graphics

Inkscape is good. I wish they would still develop Xara XL

What I am missing in your List:

Recoll. Find Stuff on your computer. One of my most important tools.

Re:Linux Productivity Tools (2019) [pdf] by ce4 on Tuesday May 19, 2020 @12:15PM (#23236553)
Try scantools instead of pdfsandwich for creating searchable OCR'd PDFs:

https://cplx.vm.uni-freiburg.de/scantools/

Easy to install and use and works great.