Firestarter is an Open Source visual firewall program. The software aims to combine ease of use with powerful features, therefore serving both Linux desktop users and system administrators.
Firestarter features

Open Source software, available free of charge
User friendly, easy to use, graphical interface
A wizard walks you through setting up your firewall on your first time
Suitable for use [...]

GNOME Do allows you to quickly search for many objects present in your GNOME desktop environment (applications, Evolution contacts, Firefox bookmarks, files, artists and albums in Rhythmbox, Pidgin buddies) and perform commonly used commands on those objects (Run, Open, Email, Chat, Play, etc.).
GNOME Do is inspired by Quicksilver (http://quicksilver.blacktree.com) and GNOME Launch Box (http://developer.imendio.com/projects/gnome-launch-box).

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lshw is a small tool to extract detailed information on the hardware configuration of the machine. It can report exact memory configuration, firmware version, mainboard configuration, CPU version and speed, cache configuration, bus speed, etc. on DMI-capable x86 or IA-64 systems and on some PowerPC machines (PowerMac G4 is known to work).
You can use gtk [...]

Ubuntu developers are working on a login feature for gnome desktop, which looks a lot like windows xp login screen, called “Gdm Face Browser”. This is still in it’s early planning stage, and perhaps we could see it in the next installation of Ubuntu (Hardy Heron).
Here is a mock up of the GDM feature:

According to [...]