Antivirus Solutions for linux

It's naive to say that Linux systems are immune to viruses. Linux systems are seldom attacked by viruses because very few viruses are developed targeting Linux systems. Officially Linux desktops are now more than 1% in desktop markets shares. It's the time when people should start thinking about Linux anti-viruses. There are some free/non free solutions: 
1. Avast Linux Home Edition
Avast is famous anti-virus for providing free anti-virus for windows, now they are providing free anti-virus for increasing Linux systems.