Applications You Must Install On Ubuntu Lucid Lynx

This will install Java, Flash, some proprietary fonts and a bunch of codecs, enabling you to view most video files and play your favorite audio formats and a lot more essential software that you may not use directly but is important all the same.

Google Chrome

Yes, Ubuntu ships with Firefox and to some Firefox is good enough, but Google Chrome is definitely the faster of the two and a good choice for an alternate browser if not the primary browser. It is not uncommon to have more than one browser on a computer.

Installing Google Chrome is easy, head on over to the Google Chrome Page, click on the big Get Chrome button, choose the 32-bit or the 64-bit deb package depending upon your computer, when the download completes double click to install Chrome. Google quietly adds its repositories to software sources so that you can get automatic updates.

The GIMP

Ubuntu no longer installs GIMP out of the box. They say the GIMP is aimed at intermediate to advanced users, and not everyone’s cup of tea. While that makes sense, I think it is too useful a software to not have on your computer.
Installation of this Ubuntu application is easy – you can use the new Ubuntu Software Center (Applications > Ubuntu Software Center), search for The GIMP and click install or a quick sudo apt-get install gimp would suffice as well.

If using the Ubuntu Software Center you can also install additional GIMP plugins and brushes while you are at it.

VLC

One of the best media players out there. Not only does it play a variety of file formats you can also do a lot more with it, as this Lifehacker post would no doubt show you. The this Ubuntu application is available via Ubuntu Software Center.

Checkgmail

Ubuntu 10.04 includes what is called the MeMenu. Justin wrote about it a few days back. While it does an excellent job of integrating chat, Twitter, Facebook and other social networks, it is nice to keep tabs with your Gmail account(s) as well.
Sure you can configure evolution to sync with your Gmail account, however if all you need is a notification when a new mail arrives you can try Checkgmail. It supports multiple accounts and Google Apps accounts as well as labels within your Gmail. Available via Ubuntu Software Center or a simple sudo apt-get install checkgmail.

Gnome Do / Launchy

Gnome-do and Launchy are Ubuntu application launchers that can help you start applications without having to find your way around the menus. You hit a hot key, type in the first few characters of the name, hit enter and the application is there. In addition both of these can do additional work like calculations, Twitter updates etc via plugins. While Gnome-Do is available via the Ubuntu Software Center, you would have to download a deb package to install Launchy.

Beagle

Beagle gives you desktop search on Ubuntu. It indexes your files and allows you to search within file contents as well. Beagle is also available in the Ubuntu Software Center. Once installed, give it some time to build up the index, then you can search.

Cheese

Cheese is a software for your webcam. It allows you to use your webcam to record videos and take photos. What makes it interesting are the different types of effects that you can play with while clicking photos. It gives you live previews of the photo with the effect applied. Very cool.

Dock

If you like a little eye candy you should get one of the many docks available for Ubuntu. Docky, which was originally available as a plugin for Gnome-do is our favorite and most feature rich. Other alternatives include AWN dock and Cairo dock.
All of these – Docky, Cairo and AWN are available via the Ubuntu Software Center. There are even more options if you are interested.

Compiz Settings Manager

If you have a relatively new computer you can take advantage of the eye-candy Compiz offers. While some of the effects are enabled by default and you can choose to use “extra” effects via System > Preferences > Appearance, you get real control using Compiz Config Settings manager. It is available via the Ubuntu Software Center (search for “ccsm”) or you can do a quick sudo apt-get install ccsm. Once installed you can tweak Compiz to your liking getting all the effects like you want.
There are so many other Ubuntu applications that we can write about. We have tried to include the apps most users would like to have on their computers. You can definitely find tons of software for any niche you are interested in. I for one like to install VIM as soon as I can, while Eclipse, Inkscape, Conduit, Dropbox are some of the other favorite ones. Ubuntu tweak is also a great software that lets you tweak various aspects of Ubuntu.
Make sure you check out our Linux section for other app suggestions and reviews.
How about sharing some love and letting us know what you like to put on a fresh Ubuntu install?