Foxit Reader
Free Personal
Foxit Reader is a lightweight, fast PDF Reader.
Notezilla
Commercial
Notezilla is a sticky notes app for Windows.
Skim
Open Source
Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF.
Microsoft OneNote
Freemium
Microsoft OneNote is a digital note taking and sharing app from Microsoft.
NixNote
Open Source
NixNote is an open source client for Evernote.
Stylus Labs Write
Free
Stylus Labs Write is a word processor for handwriting.
Compare xournal with alternatives
Compare Foxit Reader and xournal and decide which is most suitable for you.
Compare Microsoft OneNote and xournal and decide which is most suitable for you.
Compare Stylus Labs Write and xournal and decide which is most suitable for you.