NoteCase is portable (Linux, Win32) hierarchical notes manager (aka outliner) coded in C++ using GTK+ toolkit. Project is inactive as of 2008/12/09, read more at: http://factoriel.blogspot.com/2008_12_01_archive.html
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.