Otak provides a visual interface to command line programs that don't have one, that allows users to select arguments from a menu. For example, it can be used as an address book program with Mutt (the default), or as a phone book with SMS sending software, or even as a list of hosts for SSH or FTP.
A cross-platform application for displaying and navigating events on a timeline.
A true IoC container enabling "build once, run anywhere" Web applications.