Install Black-Amber Theme, Dragon-Equinox Theme, Gnombiance Theme in Ubuntu 11.10 Oneiric Ocelot/Linux Mint 12 Lisa (Gtk 2/3, Gnome Shell, Unity)

First of all install Gnome Tweak Tool to change Theme and Icons.

1 - Dragon Equinox

Dragon Equinox Theme is Compatible with (Gnome Shell 3.2.1 - 3.2.2.1/GTK3/GTK2)
1st Download Theme Wallpaper
2nd Install Awoken Dark Icons

To Install Theme on Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

• sudo add-apt-repository ppa:noobslab/themes
• sudo apt-get update
• sudo apt-get install dragon-equinox-extension dragon-equinox-theme

2 - Gnombiance Theme

Gnombiance Theme is Compatible with (Gnome Shell 3.2.1 - 3.2.2.1/GTK3/GTK2)
1st Download Theme Wallpaper
2nd Install Faenza Icons

To Install Theme on Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

• sudo add-apt-repository ppa:noobslab/themes
• sudo apt-get update
• sudo apt-get install gnombiance-theme gnombiance-extension

3 - Black Amber Theme

Black Amber Theme is Compatible with (Gnome Shell 3.2.1 - 3.2.2.1/GTK3/GTK2)
1st Download Theme Wallpaper
2nd Install Awoken White Icons
3rd Some theme tweaks open Terminal and enter following commands:
Following commands for lightdm:

• wget http://dl.dropbox.com/u/53319850/NoobsLab.com/unity-greeter.conf.zip
• unzip unity-greeter.conf.zip -d /etc/lightdm

Following commands for Unity Greeter:

• wget http://dl.dropbox.com/u/53319850/NoobsLab.com/unity-greeter.zip
• unzip unity-greeter.zip -d /usr/share/unity-greeter

Following commands for Unity Start Orb:

• wget http://dl.dropbox.com/u/53319850/NoobsLab.com/unity-start-orb.zip
• unzip unity-start-orb.zip -d /usr/share/unity/4

To Install Theme on Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

• sudo add-apt-repository ppa:noobslab/themes
• sudo apt-get update
• sudo apt-get install black-amber-theme black-amber-extension

Source: Astral-1 on DeviantArt