Kubuntu

Ubuntu Operative System + KDE Plasma Desktop

Comparison Ubuntu - Kubuntu Link

Software Ubuntu Kubuntu
Kernel & Core Linux kernel & Ubuntu core
Desktop Unity Plasma Desktop
Browser Firefox Rekonq
Office suite LibreOffice
Email & PIM Thunderbird Kontact

After install Kubuntu:

sudo apt-get install kubuntu-restricted-extras

Install VLC from Muon Software Center
Moun Update Manager

Install R packages:

sudo apt-get update
sudo apt-get install r-base
sudo apt-get install r-base-dev

RSTUDIO from webpage

Shutter en Muon Software Center