My setup Ubuntu 12.04

1. Check that everything is updated

sudo apt-get update && sudo apt-get upgrade

2. Install Ubuntu tweak

sudo add-apt-repository ppa:tualatrix/ppa 
sudo apt-get update && sudo apt-get install ubuntu-tweak

3. Install via Ubuntu Tweak and add repositories
Opera: best Internet browser
Evolution: synchronize calendar with Google calendar
VirtualBox 4.1: run other operating systems
Transmission: torrent
GIMP: image editor
Shutter: screen-shoots
Dropbox
Ubuntu[ restricted extras: miscellaneous
7zip: compressor rar, zip, etc

Others
Glippy: clipboard management

sudo add-apt-repository ppa:bikooo/glippy
sudo apt-get update && sudo apt-get install glippy

Nautilus Open in terminal:

sudo apt-get install nautilus-open-terminal

PSPP / RCmdr: data analysis
Classic Gnome: applet for classic gnome menu

sudo apt-add-repository ppa:diesch/testing
sudo apt-get update && sudo apt-get install classicmenu-indicator

Libreoffice integration

sudo apt-get install lo-menubar

Cups-pdf: print to PDF file

sudo apt-get install cups-pdf

Unity Academic Lens: for search scientific articles in Pubmed & Google Scholar

sudo add-apt-repository ppa:markjtully/ppa 
sudo apt-get update && sudo apt-get install unity-lens-academic unity-scope-zotero - 

Zotero
download and unzip in /opt

Creat a file zotero.desktop

gksudo gedit

#!/usr/bin/env xdg-open
[Desktop Entry]
Type=Application
Name=Zotero
GenericName=Bibliography Manager
Icon=/opt/Zotero_linux-x86_64/chrome/icons/default/default48.png
Exec= /opt/Zotero_linux-x86_64/zotero %f
Categories=Office
Terminal=false

store in /usr/share/applications. Thenm creat a Zotero folder in My Documents, then creat symlink in the Dropbox folder

ln -s /home/sergio/zotero_files /zotero-dropbox

change default folder in Zotero to /zotero_files

Install Java

sudo add-apt-repository ppa:webupd8team/java 
sudo apt-get update && sudo apt-get install oracle-java7-installer

Update junio 2013
Gummi: a LaTeX editor
cb2bib: a free, open source, and multiplatform application for rapidly extracting unformatted, or unstandardized bibliographic references from email alerts, journal Web pages, and PDF files
GTimer: Tracks time for one or more tasks simultaneously
frogr: a small application for the GNOME desktop that allows users to manage their accounts in the Flickr image hosting website

Update agosto 2013
Everpad: Evernote client
qnotero: provides lightning quick access to your Zotero references