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Riding on the Halo effect of Apple’s popular iPod, more and more Windows users are switching to Mac. Here’s a list of apps that replace windows’ in Mac OS X.

Browsers

Camino - a Mac OS X-native browser built on Mozilla’s Gecko rendering engine. [download]
 

Firefox - a free and open source web browser, uses Gecko layout engine.  [download] 
 

Safari - Mac OS X’s pre-installed browser. Built around the WebKit open source project , it was designed to render web pages blazingly fast and includes a number of innovative features.

Replace Internet Explorer!

 

Burner

Burn - a burning application for Mac OS X. [download]
 

Replace Nero

 

Chat

Adium - a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more. [download]

 

Colloquy - an open source IRC, SILC and ICB chat client for Mac OS X [download] 

Replace Windows Live Messenger, Yahoo Messenger, Trillian, Pidgin, mIRC

 

Download Manager

Speed Download - an award winning download manager for Mac OS X. $[download]

 

Replace Orbit Downloader, Download Accelerator

 

File Compression

 
 Compress Files - an easy to use tools for compress, archive, encrypt files and omit Mac-specific invisible files. $[download] 

 

StuffIt Expander - this free application automatically expand and decode files you download from   the Internet. [download]

Replace WinRAR, WinZip

 

FTP

Cyberduck - an open source FTP, SFTP, WebDAV and Amazon S3 browser licenced under the GPL with an easy to use interface. [download]

Transmit - the next-generation Mac OS X FTP client. $[download] 

 

Replace FileZilla

 

GTD

Things - simple but highly rated task management application. [download]

OmniFocus - professional-grade personal task management application. $[download]

iGTD - a GTD-like personal organizer. [download] 

 

Replace Microsoft Outlook(Add-In), TaskMerlin, ToDoList

 

Image Editor

Paintbrush - a Cocoa-based paint program for Mac OS X, similar to Microsoft Paint and the now-defunct MacPaint. [download]

Replace Paint

 

Image Viewer

Xee - a lightweight, fast and convenient image viewer and browser. [download]

 

Replace IrfanView,  Windows Picture and Fax Viewer

 

Media

VLC Player - a highly portable multimedia player for various audio and video formats as well as DVDs, VCDs, and various streaming protocols. [download]

 

Replace Windows Media Player

 

NotePad

TextWrangler - a powerful general purpose text editor. [download]

 

xPad - the ultimate notepad, TextEdit and Stickies replacement for Apple’s OS X. [download]

 

Replace Notepad

 

Office Suite

NeoOffice - a full-featured set of office applications (including word processing, spreadsheet, presentation, drawing, and database programs) for Mac OS X. [download]

 

Replace Microsoft Office

 

P2P

Transmission - a fast, easy, and free multi-platform BitTorrent client. [download]
 

Vuze - a free BitTorrent client used to transfer files via the BitTorrent protocol [download] 

 

Replace BitComent, uTorrent

 

PDF Viewer

Preview - Mac OS X’s default PDF viewer.

Skim - a PDF reader and note-taker for Mac OS X. [download]

 

Replace Adobe Reader, Foxit

 

RSS Reader

NetNewsWire - the most popular Mac OS X RSS reader. Developed by NewsGator, the same with FeedDemon. [download]
 

NewsFire - simple to use and packed with features, NewsFire makes it a joy to keep atop the constant flow of information on the web. [download]
 

Shrook - a next-generation news reader that is not only easy to use, but offers advanced features not available to Mac users anywhere else. It supports all versions of RSS and Atom. [download]
 

Vienna - a freeware, open source RSS/Atom newsreader for the Mac OS X operating system. [download] 

 

Replace Snarfer, FeedDemon