7-Zip
7-Zip is a free file archive manager that supports many different formats, including ZIP and RAR.

Audacity
Audacity is a free sound editing and recording application.

AVG Anti-Virus
AVG Anti-Virus Free Edition is an anti-virus application that rivals commercial version such as Norton.

Blender
Blender is a 3D modeling and animation program.

CamStudio
Screen recording software that can save videos to AVI or flash SWF.

Deluge
A lightweight cross-platform BitTorrent application that has plugin support.

Dia
Dia is a diagram and graph drawing application, originally based on Microsoft Visio, that makes it easy to draw flow charts, graphs and other diagrams.

Digsby
A three-in-one application that includes an Instant Messenger client, email notifications, and social network integration with sites like twitter and facebook.

FileZilla
FileZilla is a cross-platform FTP client that supports secure file transfer.

Firefox
Firefox is an excellent free browser that provides a much more secure and friendly browsing experience that Microsoft Internet Explorer.

Foxit Reader
Foxit Reader is a lightweight alternative to Adobe's Acrobat PDF reader.

GIMP
GIMP (The GNU Image Manipulation Program) is a free image editor similar to Photoshop. It can be used for things like photo retouching, image composition and image authoring.

Google Chrome
Chrome is a brand new browser from Google that makes the web faster, safer and easier.

Google Earth
Google Earth combines satellite imagery, maps, terrain and buildings onto a 3D globe that you can move around.

Google Pack
A one-stop software package that helps you discover, install, and maintain a wide range of essential PC programs.

Handbrake
Handbrake is a DVD ripping application, allowing you to convert a DVD to a video file.

Inkscape
Inkscape is an open-source vector graphics editor similar to Adobe Illustrator or Corel Draw.

Mendeley
Mendeley helps you to manage a collection of research papers, and supports automatic extraction of metadata from PDFs.

Miro
A video player with access to over 1000 Internet TV channels.

Notepad++
A powerful and fully features text editor that has built in syntax highlighting support for around 50 different programming languages.

NVu
A complete Web Authoring System that rivals programs such as FrontPage and Dreamweaver.

OpenOffice
OpenOffice is a free and full featured alternative to Microsoft's office suite.

Opera
An award winning free Web browser that is a very fast and feature packed.

Paint.NET
A fully featured but easy to use image editing application.

Picasa
Picasa is a free application from Google that lets you organise and share your digital photos.

Pidgin
Pidgin, formerly known as Gaim, is a multi-protocol instant messenger client, working with Yahoo IM, AIM, Google talk, MSN and others.

SciTE
A feature packed text editor with many advances features for programmers.

Scribus
Scribus is a Desktop Publishing (DTP) application which can be used to create professional quality documents.

Skype
Skype allows you to make phone calls from your computer - to other skype users for free, and very cheaply to phones and mobiles.

Spotify
An online media player that offers you legal and free access to a huge library of music.

Synergy
Synergy lets you easily share a single mouse and keyboard between multiple computers with different operating systems.

Thunderbird
Simple and lightweight email and news application.

VLC media player
VLC is a media player that supports many different audio and video file formats.

WinAmp
WinAmp is a skinnable media player for windows that supports many different file formats.

WinSCP
A simple FTP and SFTP client for Windows.

Wireshark
Wireshark is a network protocol analyzer with many advanced features.

µTorrent
µTorrent is the most popular BitTorrent P2P application for windows.