Xournal and it's successor Xournal++ is pretty handy...
Xournal++
https://xournalpp.github.io/
The predecessor
http://xournal.sourceforge.net/
New: OneLoupe (May 1, 2025), Platform 30.0.2 (Mar 27, 2025)
1,100+ portable packages, 1.2 billion downloads
Ad Free! Please donate today
Xournal and it's successor Xournal++ is pretty handy...
Xournal++
https://xournalpp.github.io/
The predecessor
http://xournal.sourceforge.net/