1
AVAST Free Antivirus
Products
Security software
Founding and company beginnings:1988-2000
Founders : Pavel Baudiš, Eduard Kučera
2 
AVG Free Antivirus
Founding and company beginnings:1997-1998
Developer(s) AVG Technologies
3 
Avira Free Antivirus
Founding and company beginnings: 1986-1987
Founder: Tjark Auerbach
4 
Bitdefender Free Antivirus
Founding and company beginnings: 2001-2002
Founder: Florin Talpeş
5 
Microsoft Security Essentials (MSE)
Initial release: 29 September 2009
Developer(s) Microsoft