Callware VoiceOne is an easy to use web based GUI for the Asterisk PBX. It gives full control over settings through a simple admin panel. You can manage extensions, preferences, POTS/ISDN/VoIP trunks, queues, and rules sets and dynamically create IVRs.
GNOME Colorscheme is a very simple application for the GNOME desktop that allows you to generate a variety of colorschemes from a single starting color.