The Best Free Applications 

1.Outpost Security Suite:

www.agnitum.com
 

Free security suite that offers antivirus, firewall and anti malware in a single package. 

2.Comodo: 

www.comodo.com

The free Comodo firewall uses cloud-based data to to protect your computer against online threats and programs.

3..Stay safe while downloading:

 www.peerblock.com

4.iSpy CCTV: 

www.ispyconnect.com

Download free software for Windows that converts your existing webcam into a surveillance device, complete with features like video recording, motion detection, face detection, audio feeds and automatic YouTube uploading.  

5.LibreOffice: 

www.libreoffice.org

LibreOffice is a free and open source cross-platform office suit. Despite its outdated user interface, LibreOffice is a very capable replacement for Microsoft Office.

6.Microsoft Security Essentials:

 http://windows.microsoft.com/en-US/windows/products/security-essentials

 Microsoft Security Essentials is a free anti-virus program.  

7. NotePad++: 

http://notepad-plus-plus.org.

NotePad++ is a free and open source text editor.Multi-tab, Syntax Highlighting, and support for Regular Expression Search/Replace are three nice feature included in this program.

8.7-Zip : 

http://www.7-zip.org.

7-Zip is a free and open source file compression utility. 

9.Gimp: 

http://www.gimp.org.

Gimp is a free and open source cross-platform image manipulation program. It is designed with Linux in mind; hence the user interface might looks strange in Windows world. Also it still uses multiple windowing system that look rather odd for today standard. Still with all of its oddness, Gimp is the best free alternative for Adobe Photo shop. From simple photo enhancement to complex digital retouching technique can be done in Gimp.

10.VLC Media Player: 

http://www.videolan.org/vlc. 
 

VLC Media Player is a free and open source cross-platform multimedia player. Ability to play a large number of multimedia file formats is one of the most praised features of VCL Media Player. MPEG-2, H.264, DivX, MPEG-4, WebM, and WMV are just a small list of file formats supported by VLC Media Player.

11.FileZilla Client:

http://filezilla-project.org.
 
Filezilla client is a free and open source cross-platform FTP client. Simple user interface and support for large number of protocols are what make the program so great.

12.Free Download Manager (FDM)

http://www.freedownloadmanager.org.
 
Free Download manager (FDM) is a free and open source download accelerator. Just like any other download accelerator program, FDM main features are to increase download speed and resume broken downloads. But this application grows to be more complex over time, many new features added in each new release. Two new nice features added in the latest version are BitTorrent support and Flash video download.

13. VirtualBox

https://www.virtualbox.org.
 
VirtualBox is a free and open source cross-platform virtual machine. It is the best free alternative to commercial virtual machine, such as VMWare and Parallel. Unlike its commercial competitors that have limited host support to Windows, Mac OS X, and Linux, VirtualBox running on all major operating systems. VirtualBox is also known to have a far better 3D support on Linux and BSD. Unfortunately DirectX support is still in experimental stage, hence playing 3D game on Windows guest won't be as good as on VMWare.