Recommended net tools

Browser

• Firefox sudo apt-get install firefox (copy & paste in terminal to install)
  
• Epiphany sudo apt-get install epiphany

Chat Messenger

• Pidgin sudo apt-get install pidgin

Download Manager

• Downloader for X sudo apt-get install d4x

Torrent

• Bit Torrent Download Client sudo apt-get install bittorrent

Plugins & Addons

• Icedtea Java Plugin
• Open Firefox. Goto Tools-Addons-Get Addons. Get a whole new variety of recommended addons by Mozilla.
  

All of them can also be installed from Add/Remove Programs GUI.