[skydhash]

On Linux, I use zathura (but I rarely annotate my PDFs and I use my iPad for that). On macOS, I used Preview (it was good enough) and PDF Expert (Not the subscription version) for editing pages and outline. On the iPad, I begrudgingly use Documents (by readdle).

My PDF are managed by Calibre, but I export various subsets to the file system, so I can find them easily (on the network).

[umbra07]

I highly recommend trying out sioyek (as a zathura replacement). it has a bunch of features that make it even more suitable for consuming technical papers/textbooks - such as a significantly faster search & index, an auto generated table of contents, highlights, and portals.