This is a full list of anti-virus, internet security software vendor companies, ranging from start-up to large companies. If anything is missed, you can contact me, with the company name to make a addition.
AhnLab, Inc. - AhnLab V3 Internet Security, AhnLab SpyZero 2007
Aladdin Knowledge Systems - eSafe Web Threat Analyzer
Authentium, Inc. – Command Antivirus for Windows
Avast- antivirus software with spyware protection
Avira – Avira Antivir , Avira Premium Security suite
Bit Defender – Antivirus 2009, Internet Security 2009, Total Security 2009
Comodo Group – Free Comodo Firewall Pro, Antivirus, Internet security
Computer Associates International, Inc. - CA Anti-Virus Plus CA Anti-Spyware 2009
Doctor Web, Ltd.- Dr.Web Desktop Security Suite
Eset – Nod32 Antivirus Software
FRISK Software International - F-Prot Antivirus for Windows, Linux, Exchange
F-Secure Corporation – F-Secure Antivirus, Virus Protection and Computer Security
G-Data – Internet Security 2009, G Data Antivirus 2009, G Data TotalCare 2009
GFI Software Ltd - GFI MailSecurity, WebMonitor for ISA Server, Endpoint Security
Grisoft – AVG Anti-virus, AVG Internet Security
HAURI Inc. - ViRobot Desktop, ViRobot ISMS
K7 Computing – K7 TotalSecurity, K7 AntiVirus
Kaspersky Lab - Kaspersky Anti-virus 2009 Software with Anti-spyware
McAfee, Inc. – Mcafee Antivirus Software and Intrusion Prevention Solutions
Microsoft Corporation - Windows Live OneCare
MicroWorld Technologies, Inc. - eScan AntiVirus (AV), eScan Internet Security Suite (ISS), MailScan
Norman - Norman AntiVirus & Spyware, Norman Security Suite
Panda Security Software – Panda Internet Security, Panda Global Protection
Proland Software- Protector Plus Antivirus Software
Quick Heal Technologies – Quick Heal Antivirus, Quick Heal Total Security 2009
Rudra Technologies – Rudra Virus Detection
SafeScribble PC Security Solutions – SS Virus Removal Tool, SS Virus Detection, SS On-Demand Virus Scanner
Sophos – Sophos Enterprise Security & Control,
Sybari Software, Inc. - (Microsoft Subsidiary) - Windows Scan Engine
Symantec - Norton Antivirus, Norton Internet Security, Norton 360
Trend Micro, Inc. - PC-Cillin, Internet Security 2009
*Some the Computer Security Companies listed are just start-up.