GPICview

GPIC View Image Viewer is a very light weight image viewer for Linux.
The best part about it is the speed which it loads up an image.It is pretty fast as compared to the Eye Of Gnome Image Viewer or the default image viewer of the Gnome environment.Install it to feel the difference.The only disappointment is the absence of a slide show view.But there is of course a full screen mode.

It provides you basic features like saving,deleting an image,zoom in and out and rotating the image.It is very basic and simple application worth an install.
Install from the Synaptic Package Manager.Search for "gpicview" and mark for installation.

GPRename

Rename a batch of files in one go with GPRename.
GPRename allows you to apply changes to the names of a group of files in one go.The interface of GPRename is very simple with an explorer at the left.Enter a directory with this explorer.The contents of the directory chosen are shown in the section adjoining the explorer.At the lower part of the window you have a section that allows you to edit the names of the files in the directory chosen.It is a tabbed section with the "Case Change","Insert/Delete","Replace/Remove",and the "Numerical"tabs.
All these sections provide you a very detailed set of options to edit the names of your files.Consider for example the "Insert/Delete" tab.Under this section,you can insert characters in the names of the files and also give the position number where you wish to insert the character.

It gives the options to add numerals to the names of the files and even replace a specific word with another.
Install GPRename from the Synaptic Package Manager.Search for "GPRename"
and mark for installation.
Enable Automatic Preview to see the changes applied instantly.Get to see the hidden files and even work in a full screen mode by using the options menu.
This application comes with a help file providing you some tips.
See the about window for credits.
Mailing list - gprename-users@lists.sourceforge.net
Home Page - http://gprename.sourceforge.net
Wikipedia - http://en.wikipedia.org/wiki/GPRename
Copyright (C) 2007 gprename-users@lists.sourceforge.net
Click Here to Watch GPRename Video.

Nautilus Extensions

Get some nautilus extensions for your desktop from the synaptic package manager.
Go to synaptic and search for "nautilus".Install the nautilus-wallpaper.This package provides an entry into the context menu of image files to set them as wallpaper witout having to go through the image viewer and the Appearance section.
Install nautilus-image converter to get an entry into the context menu of image files for rotating and resizing them.

Install the nautilus-open-terminal to open a terminal at any location.Jist right click in a folder or on the desktop and open a terminal window right there.
You can also try the nautilus-script-manager to easily use scripts and link them to a private scripts directory.

Googlizer-Instant Google Search!

Get instant Google Search for your ubuntu desktop with Googlizer.
While reading some text or browsing a web page you may come across a term or a word that you do not know much about.Now,instead of searching for such words by typing in the Google search bar,you can just highlight the word and click on the Googlizer icon.Googlizer does a Google search of the highlighted part.
You can even search for more than one word by pressing the CTRL key while highlighting the words.

Install Goolizer from the Synaptic Package Manager.You can access it from the Internet menu.For the best use of Goolizer place it on a panel.
So just highlight the keyword and click the Goolizer icon on the panel.This would open a firefox window with the relevant Google search entries.

Graphical Disk Map.

Get to know your hard disk usage in a refreshing new way with the Graphical Disk Map.This application displays tree maps which vary in size depending upon the size of the file they represent.So you can get straight down to the folder or file that holds the maximum amount of data.Ubuntu installs with itself the Disk Usage Analyzer that does a similar job but Graphical Disk Map is faster and makes it is easy to track down a file or a folder.
It uses different color profiles for folders and files so it becomes very easy to distinguish between the two.These color profiles are customizable and you can select colors for various file formats also.

It gives you an option to choose the display type from the standard cushioned tree maps and squarified cushioned tree maps.You can also vary the height factor,decreasing height and the maximum display.
Install this application using the Synaptic Package Manager.Search for gdmap and mark for installation.

Mark Packages by Task in Synaptic.

Marking packages by task is a feature available in the Synaptic Package manager ,which makes installing complete desktop environments and other packages very simple in ubuntu.Suppose you want to install KDE or Xubuntu in you Gnome Desktop Environment.Then,instead of searching for individual packages and marking them separately,you can use the Mark Packages By Task option.It gives you some predefined options such as installing different desktop environments,servers and even 2d/3d editing suites.Simply mark a task and apply.Synaptic would itself mark the individual packages and install them.This is very handy feature that saves a lot of time.
Use this feature to install the KDE 4 package.