The Portable Freeware Collection Forums

Keyboard-focused, rapid searching PDF tool aimed at research / tech docs

Seems to understand portability
https://github.com/ahrm/sioyek/issues/25

Status: Untested, but expect to look at this in the coming month.
License: GPLv3 (open source freeware)

https://github.com/ahrm/sioyek
https://www.softpedia.com/get/Office-to ... oyek.shtml
https://www.reddit.com/r/software/comme ... igned_for/
https://alternativeto.net/software/sioyek/

Update : now at v2.0.0 and it's portable ...

Sioyek is a bit like if you were using JPEGView but for PDFs. It's very straightforward and keyboard driven.

If you work with PDFs a lot and don't mind having another window open with the various shortcuts while you get used to the program, it's fantastic. Very low on distractions so you can focus on what you're reading.

Steps: Download the portable zip file from https://github.com/ahrm/sioyek/releases and unzip. Launch sioyek.exe.

Status: Portable, writes to the app folder

Config note: I am a huge fan of Regex but to enable this you need to modify a config file: prefs.config and make a small change to the "fast search" line (delete the # sign in front):

FROM: TO: More on this: https://github.com/ahrm/sioyek/issues/407