Some screenshots:

GnoMenu is a consolidated menu for gnome that brings eye candy to the world of the Gnome menu's. Fully functional menu, supports themes, for a composited or non composited desktop. It can emulate the look and feel of the most beautiful menus of most modern desktops, and it can also custom menus, due to its powerful theme XML engine.

Linux Unified Kernel claims to allow you to run Windows application native under Linux (I haven't tested it yet though).

watsup is a simple application for Ubuntu that monitors system resources and the processes using those resources and you can also use it to kill a process.f

The 2 below tools are capable of performing an extensive and detailed analysis of your PC, display information about hardware, software, network configuration, etc. You can do this easly under Windows with Everest but how about Linux? Recently I wanted something similar and found the below 2 applications (I wanted something with a GUI):

Facebook Notify is a small application which monitors your Facebook profile and notifies you when it changes.

It notifies you when any of the following events occur

* One of your friends changes their status, profile picture, or profile details
* You receive a friend request, event or group invitation

SopCast Player is designed to be an easy to use Linux GUI front-end for the p2p streaming technology developed by SopCast. SopCast Player features an integrated video player, a channel guide, and bookmarks. Once SopCast Player is installed it simply "just works" with no required configuration.

In Ubuntu (and most Linux distributions), your disks are checked every certain number of times your computer starts (using "fsck", "file system consistency check") to detect errors and correct them. If you're in a hurry, you can press the ESC key to skip this checking process and it will scan the disks the next time you start your computer.

aTunes is a full-featured audio player and manager, developed in Java programming language, so it can be executed on different platforms: Windows, Linux and Unix-like systems.

Gyachi is a Yahoo! client for Linux operating system that supports almost all of the features you would expect to find on the official Windows Yahoo! client: Voice chat, webcams, faders, 'nicknames', audibles, avatars, display images, and more.

Features:
- manages your tasks and launchers;
- tasks filtering, grouping (including manual) and sorting;
- launcher to task transition (icons of launchers with running tasks are hidden);

Unfortunately, maintaining a multi-boot configuration like this can be a pain, especially if you later install an operating system which overwrites the GRUB boot loader you had in place (such as a version of Windows). If your boot loader is overwritten, you could be left with no choice but to boot the most recently installed OS.

BleachBit is a Linux application that allows us to free up disk space, deleting unnecessary files that are either orphaned, temporary files or cookies, internet history, menu entries broken, etc.. and also helps to protect our privacy.

After a loving incubation period, the Moonlight 2.0 preview, an open source implementation of Microsoft's Silverlight for Linux has been released:

Gimp Paint Studio is a package of new tools and additions which provide improved capabilities focused on drawing and painting for Gimp.

gmusicbrowser is an open-source jukebox for large collections of mp3/ogg/flac/mpc files, written in perl.

Although some of this stuff is old, here are some funny Easter eggs I bumped into over time.

In APT
Fire up a terminal and type the following, one command at a time: