Antivirus
No matter how safe you may feel without an antivirus, it definitely is a must-have application these days. And it's a good thing those come for both general purposes and things of more particular nature, like safe Internet surfing. This category gives you numerous antiviruses to choose from.
360 Total Security
Baidu Antivirus
Malwarebytes Anti-Malware
AVG Free
ESET Smart Security
COMODO Internet Security
Avast Free Antivirus
USB Disk Security
avast! Antivirus
NOD32
Quick Heal AntiVirus Pro
Quick Heal Total Security
Windows Defender
Microsoft Security Essentials
AVG
avast! Internet Security
Kaspersky Internet Security
Spybot
avast! Pro Antivirus
Wise Anti Malware
K7TotalSecurity
Kaspersky Anti-Virus
Guardian AntiVirus
Zombie Exposer
Panda Cloud Antivirus
avast! Free Antivirus
AVG Zen
Norton Internet Security
Ad-aware
Kaspersky Anti-Virus 2010
Discover FDM
Add-on support
You can get add-ons that download files/video from arbitrary websites.