Annotation

This page discusses some of the [software libre] available for annotating digital documents.

Jarnal

Jarnal is Java-based PDF annotation software. It runs on Linux, Mac OS and Windows.

Okular

Okular is the KDE document viewer. While the underlying PDF reader library [w:Poppler (software)|Poppler] does not yet support annotations, Okular stores inking information its own database. Okular is a part of KDE and as such available for Linux, Mac OS and Windows as part of the KDE suite (sometimes packaged with kdegraphics).

Xournal

Xournal is a GTK+-based inking application. It runs on Linux and potentially on other platforms.