I have a laptop with OS X 10.6.8, and it needs anti-virus. I went to the App Store, but everything wants 10.7 and later. I need a software recommendation.
One known Antivirus app still running on Mac OS X 10.6.8 is Avast Antivirus 2015 for Mac. Download link (almost direct link Avast).
I don't think you NEED an antivirus (In 25 years I have never used one and never had a virus). I do have the free ClamXav which I use to scan external disks before mounting on my Mac.