Anti-Spam SMTP Proxy Server implements multiple spam filters
Anti Spam SMTP Gateway
CIDRAM: Classless Inter-Domain Routing Access Manager.
An InApp and Browser Adblocker based on hosts file blacklists
Perhaps the smallest system-wide Adblocker ever!
Hostsfile updater that pulls an updated hostfile from an online source
Open Source Anti-Spam and Anti-Virus Gateway
Virtual Appliance of RadicalSpam
'SMS and Call Filter' can filter sms based on trained data set.