BookONO eBook Manager is an e-book manager and convertor designed as a compliment to Calibre. It is not a rewrite of Calibre, but instead an alternative product which makes some different design decisions. It uses Calibre to do a lot of the heavy lifting, so despite being an independent application, it is considered complimentary to Calibre.
DeforaOS Browser is a file browser for the DeforaOS desktop. It depends only on GTK+ 2 and the DeforaOS System and Desktop libraries. It supports browsing with multiple views, MIME type application association, and file manipulation. It also features a program to display file icons on the desktop, which is useful with window managers like WindowMaker or Fluxbox.