Google Chrome 27.0.1453.110 Stable / 28.0.1500.44 Beta / 29.0.1535.3 Dev

A browser that combines a minimal design with sophisticated technology.
Developer: Google
License: Freeware / Free
Size: 33.2 MB
OS: Windows XP / Vista / 7 / 7 64 bit / 8 / 8 64 bit

Firefox 21.0 / 22.0b5 Beta / 23.0a2 Aurora / 24.0a1 Nightly

The browser provides virus, popup and spyware protection in a simple, easy to use tabbed interfac.

Developer: Mozilla

License: Mozilla Public License / Free

Size: 20.4 MB

OS: Windows 2K / XP / 2003 / Vista / 7 / 7 64 bit / 8 / 8 64 bit

Kaspersky Anti-Virus 2013 13.0.1.4190 / 2014 14.0.0.4417 Beta

An antivirus that provides all types of anti-malware protection
Developer: Kaspersky 
License: Trial
Size: 147 MB
OS: Windows 2K / XP / Vista / 7

AVG Free Edition 2013 Build 3343a6324

The world's most downloaded free security software
Developer: AVG Technologies
License: Ad-supported / Free
Size: 130 MB
OS: Windows XP / Vista / XP X64 / Vista64 / 7 / 7 x64

Avira Free Antivirus 13.0.0.3640

Extensive virus protection for home users
Developer: Avira GmbH
License: Ad-supported / Free
Size: 2 MB
OS: Windows XP / Vista / XP X64 / Vista64 / 7 / 7 x64

Avast! Free Antivirus 8.0.1489

Reliable antivirus software with spyware protection
Developer: AVAST Software
License: Ad-supported / Free
Size: 112 MB
OS: Windows 2K / XP / Vista / XP X64 / Vista64 / 7 / 7 x64 / 8 32-bit / 8 64-bit

Norton AntiVirus 2013 20.3.1.22

Powerful protection from viruses and spyware that won’t slow you down
Developer: Symantec
License: Ad-supported / Free
Size: 171 MB
OS: Windows XP / Vista / Vista 64 bit / 7 / 7 64 bit / 8 / 8 64 bit

ESET NOD32 Antivirus 6.0.316.0

The world's fastest and most effective proactive antivirus and antispyware protection
Developer: Eset
License: Trial
Size: 48.1 MB
OS: Windows XP / Vista / XP X64 / Vista64 / 7 / 7 x64 / 8 32-bit / 8 64-bit