This page discusses some of the #REDIRECT [[software libre]] available for annotating digital documents. ==Jarnal==[http://jarnal.wikispaces.com/ Jarnal] is Java-based PDF annotation software. It runs on Linux, Mac OS and Windows. ==Okular==[http://okular.kde.org/ Okular] is the KDE document viewer. While the underlying PDF reader library [[wu:Poppler (software)|Poppler]] does not yet [http://live.gnome.org/Evince/Annotations 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. Annotation of PDFs is supported by loading a [[w:Poppler (software)|Popplar]]-rendered PDF as a background image, but it requires that annotations be saved to a separate .xoj file or exported to a new PDF file, and does not support annotating PDF files directly. [[Category:Libre course software]][[Category:Comparisons of desktop software]]