open source software

i read in a site that open source software are good alternative to free software and are legitimate software.
if you guyz know good open source software for the following please mention –

firewall
antivirus
antispyware
antitrojan
behaviour blocker/hips
antiphishing
popup blocker
identity theft protection/password manager
■■■■ cleaner
registry cleaner
encryption
secure deletion
registry defragment
disk defragment
software update monitor
virtualization
eulalyzer

thanxx guyz

naren

I know a good open source antivirus would be Clamwin http://www.clamwin.com/ but it is only an On Demand antivirus meaning it will not detect a virus unless you scan that file or entire hard drive.

LA

I don’t think I know any open-source stuff… I was gonna give you free-ware but read the title better…