Dudle - Dudle is an online scheduling application, which is free and open source.
xfdesktop - The xfdesktop application manages the desktop backdrop.
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
cryo - A visual file manager
Framadate - Make your polls
GNOME Commander - GNOME Commander is a "two-pane" graphical file manager for the GNOME desktop environment.