Well, we all know how open source community is gaining access in to the software world. The best thing about the open source software is they are free to use. All open source software are released under GPL license. We have a large and many self supporting open source user community, where people are technically strong. There are many people out their, distributed through out this world and connected together for 24 hours a day and 7 days in a week. ok….thats enough,let me give a small list of alternate open source software for linux. Infact starting from the operating system till the software that you use in linux are open sorce.

Web Browser equivalent for IE in Linux

Konqueror.
Opera.
Firefox.
Nautilus.
Epiphany.

Email Clients equivalent for Outlook

1) Evolution.
2) Netscape / Mozilla/Thunderbird messenger.
3) Sylpheed / Claws Mail.
4) Kmail.
5) Gnus.

FTP Agents : File zilla is the most commonly used in windows,its not a proprietary software,its a open source software

1) Gftp.
2) Konqueror.
3) KBear.
4) IglooFTP. [Prop]
5) Nftp.

Editors

linux has a powerful editor that are no way less eqiuvalent to Microsoft office

open office                                                                                                                                          star office

This is just a few list, from few categories.

whenever linux is installed, you will be getting all the softwares pre-installed in your system. Some of most commonly linus operating system are Fedora(current version 11), ubuntu, open suse, mandriva(formely called as mandrake, knoppix( comes with good visual effects).