Okular is a great PDF Reader. It supports annotating pdfs and viewing many other file formats including PS, Tiff, CHM, DjVu, DVI, XPS, ODT, Plucker, EPub, Mobipocket, fictionbook, comicbook, and markdown. I don't even remember how long I have been using it. It is made by KDE, cross-platform, free, and op...
ProTabbed view option
ConRequires many KDE libraries
ConNo XFA Adobe Forms support
I use Joplin for note-taking, personal task management (GTD-style), and as a knowledge management system (Zettelkasten-style), synced over multiple devices (including mobile). It's very mature, and keeps on growing and being actively developed. A wonderful, powerful, and simple app. The recent addition...
ProOpen source project
ProMany client platforms supported
I am using this software daily. This easy to use app saves me a ton of time daily
ProDoesn't require internet connection
ProCan turn recognized text to speech
ProDon't need to think about file formats
ProRecognizes text in few seconds
ProEasy to use
ConLimited text recognition language support
Extremely helpful for teachers who constantly receive tons of PDF homeworks from students. Tried many PDF viewers and this is by far the most convenient for homework grading, as it includes all the features I possibly need.
ProUser-friendly advanced printing
ProResponsive to critiques
ProAdvanced print & search options
I wanted something to be able to combine lecture notes into 1 file per unit and other than Adobe Acrobat I didn't know how to. I found this after some googling and it was super simple to use and had all of the functionality I wanted from Acrobat without the price tag!
ProCan merge, split or extract pages from PDFs