AVG Antivirus
Description: AVG Anti-Virus Free Edition is a free anti-virus protection tool developed by GRISOFT for home use. We invite you to join the millions of satisfied customers worldwide who have downloaded the software and now enjoy the benefits of AVG Anti-Virus Free.
URL:

http://www.free.grisoft.com

Avira AntiVir PersonalEdition Classic
Description: Avira AntiVir PersonalEdition Classic reliably protects your private computer against dangerous viruses, worms, Trojans and costly dialers. More than 15 million users worldwide trust in the reliable protection of Avira AntiVir. And this is no coincidence at all: Avira has gained several awards. The product combines first-class detection rates and ease of use with a top performance that protects your computer safely and hardly burdens older PCs.
URL:

http://www.free-av.com

Free avast! 4 Home Edition
Description: avast! 4 Home Edition is a full-featured antivirus package designed exclusively for home users and non-commercial use. Both of these conditions should be met! Our company offers the Home Edition free of charge, since, in our opinion, it is possible to avoid global virus spreading by efficient prevention; however, many users are not able to or do not want to pay for antivirus software. This page will show you the most important features of this program. Institutions (even non-commercial ones) are not allowed to use avast! Home Edition. However, ALWIL Software provides the full line of avast! antivirus products at special discount prices for non-profit, charity, educational and government institutions.
URL:
http://www.avast.com