PDF

Readers

• zathura pdf reader
• sumatra pdf reader
• okular
• Sioyek
  • https://github.com/ahrm/sioyek

Editors

• pdftk
• libre office draw
• jjpdfbookmarks - https://sourceforge.net/projects/jpdfbookmarks/

Annotators

• xournal
• xournal++

poppler-utils

• pdfattach
• pdfdetach
• pdffonts
• pdfimages
• pdfinfo
• pdfseparate
• pdfsig
• pdftocairo
• pdftohtml
• pdftoppm
• pdftops
• pdftotext
• pdfunite