Lighter than Feather: Unity
Unity 2D is a stripped down version of Unity 3D meant for old hardware which does not support Compiz. It's much faster than Unity 3D and lighter too.
Unity 2D has almost every feature that Unity 3d has. This includes the beautiful dash where you can search for applications, files and music (you can directly search the Ubuntu One music store for buying music). You can even narrow down your search results by using various filter options. Use the dash with the Faenza icon set: a treat for the eyes.
Unity 2D uses a fantastic Ambiance theme by default which has been recently refined by the Canonical design team. The Ubuntu Software Center has also been given a major overhaul. In short, your old computer running on Unity 2D based Ubuntu just got a lot prettier.
Gnome-pie is a small cyclic launcher that can make launching applications more fun. If you do not like the dash, you can always use this Open Source software which supports both keyboard and mouse navigation. The official PPA is available on Launchpad.
Sleek Sound Menu
This is nothing new if you have used Ubuntu before. The sound/volume indicator at the top panel also houses the sound menu which can be used to control Banshee (or any other player which supports it).
Light on Resources, Heavy on Features: XFCE
This is the what you get after you install XFCE from the Software Center on Ubuntu 11.10. XFCE is a fork of the GNOME 2 project and it known primarily for its simplicity and light memory footprint. But don't let the simplicity fool you, this desktop is highly customizable.
Tweak Appearances Easily
Changing the look and feel of the desktop is quite easy. By default, there are loads of customisation options available.
Right-click Menu Increases Productivity
The desktop itself is quite productive. Right-clicking on the desktop reveals the Applications menu. Also notice that the dock and the panel has been repositioned. The iconset in use is Faenza. XFCE, by default also comes with a collection of applications to fulfill your daily needs (some extra applications seen above is due to the inclusion of some GNOME applications).
Give Your Old Desktop a Facelift
Customizations like these certainly give your old computer a facelift. Tweaking the desktop to suit your everyday needs can make life a lot easier.
XFCE: Ambiance Style
Another example of how customizable XFCE is. Firefox looks almost the same on Unity.
Enlightenment is a window manager which can often be used as a substitute for a full desktop environment. Enlightenment has a light and refreshing look and should be good enough for your everyday needs. Another highly configurable software, Enlightenment is definitely geeky.
Handy Mouse-click Menu
Like XFCE, clicking on the desktop reveals the menu and other system settings. The dock at the bottom, among other things, has a workspace switcher.
Tiny, Yet Heavily Customizable
The desktop environment has a loads of settings which can be easily customizable. Normal Ubuntu applications work well. However, some applications may not look as beautiful as you would expect them to look (for instance, the Ubuntu Software Center looked quite ugly).
Almost every aspect of the software can be tweaked to your needs.
Lightweight and Sleek: LXDE
Lubuntu is the latest inclusion in the official line of desktop environments supported by Canonical. LXDE for Ubuntu is supported by a vibrant community whose goal is to create a bautiful and functional desktop with very low memory usage. Normal GNOME software for Ubuntu works quite well for Ubuntu 11.10 with LXDE.
Customization at Your Fingertips
Like XFCE, LXDE also supports numerous themes/customizations to make your desktop look more beautiful. You can modify almost anything possible.
LXDE: Ambiance Style
You can change the window decorators for Openbox using Openbox Configuration Manager. Themes can also be downloaded from https://box-look.org
Changing Bottom Panel Properties
Almost everything from panel transparency to panel color can be tweaked to your preference.
Blends in Beautifully
After playing with the themes and settings for a while, I finally manager to bring a consistent look to the desktop. Notice how Totem Movie Player looks well intergrated with the rest of the desktop.
Looks Awesome with Darker Themes
Clicking on the LXDE logo on the menu bar opens up the menu. Nice and easy.
Non-native Software Well Integrated
Applications worked perfectly and looked quite pretty. You just need to find the right theme suitable for your desktop. Within 30 minutes of installing LXDE, I had customized a lot of things.
Sleek, Yet Tiny
LibreOffice looks better. Period.
Everything Works Perfectly!
LXDE is definitely one of the most exciting projects out there and you should definitely keep an eye on this project if you want a fully functional operating system for your old hardware.
Fluxbox is a no-frills easy to use desktop environment with support for desktop themes. It has a right-click menu support and multiple workspaces.
Awesome is simply awesome. It aims to be small and fast and yet provide the user with a fully-functional and customizable environment.
And if You are a Power USer
There is nothing in the Linux world as powerful as the command line. If you have the experience, want to know more about being a power user, you should give Xterm a go. Almost everything you can imagine can be done with this powerful and extremely productive tool. Having Emacs or Vim installed on it, do I need to say more?
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