12. Download Manager

Windows equivalent : Free download manager

Ubuntu equivalent : Multiget

MultiGet

It is a http/ftp downloader with a nice GUI for linux desktop users. It can run on almost all desktops without any configuration. It has many powerful functions comparing to others.

sudo apt-get install multiget

Access it through Applications → Internet → MultiGet

13. Graphical Email client

Windows equivalent : Outlook

Ubuntu equivalent : Evolution, Thunderbird

Evolution (installed by default in Maverick)

sudo apt-get install evolution

Access it through Applications → Internet → Evolution Mail

Thunderbird

sudo apt-get install thunderbird

Access it through Applications → Internet → Mozilla Thunderbird Mail/News .

14. Instant Messanging protocal clients

Windows equivalent : MSN messenger, Yahoo messenger, QQ, AIM, Gtalk, ICQ,IRC

Ubuntu equivalent : Empathy, Pidgin, emesene

Empathy IM Client (installed by default)

Add the related launchpad repository :

sudo add-apt-repository ppa:telepathy/ppa && sudo apt-get update

Then install it by running the following :

sudo apt-get install empathy telepathy-mission-control-5 telepathy-gabble telepathy-butterfly telepathy-haze telepathy-idle telepathy-salut telepathy-sofiasip libtelepathy-farsight0 python-tpfarsight galago-eds-feed python-galago python-galago-gtk msn-pecan

Access it through Applications → Internet → Empathy IM Client .

Pidgin

Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once. Supported chat networks: AIM, Bonjour, Gadu-Gadu, Google Talk, Groupwise, ICQ, IRC, MSN, MySpaceIM, QQ, SILC, SIMPLE, Sametime, XMPP, Yahoo!, Zephyr

Add the launchpad repository :

sudo add-apt-repository ppa:pidgin-developers/ppa && sudo apt-get update

Then install it :

sudo apt-get install pidgin pidgin-data pidgin-lastfm pidgin-guifications msn-pecan pidgin-musictracker pidgin-plugin-pack pidgin-themes

Access it through Applications → Internet → Pidgin Internet Messenger .

Emesene only for MSN Messenger.

Add the launchpad repository :

sudo add-apt-repository ppa:bjfs/ppa && sudo apt-get update

Then install it :

sudo apt-get install emesene

Access it through Applications → Internet → Emesene .

15 . VOIP

Windows equivalent : skype

Ubuntu equivalent : skype

Skype

sudo apt-get install skype

Access it through Applications → Internet → Skype