Spamihilator - The free Anti-Spam-Filter Spamihilator removes more than 98% of spam mails before they even get into your inbox.
Nomorobo - Nomorobo blocks annoying robocalls, telemarketers, and phone scams.
SpamAssassin - Use this program to "Unspam" your mailbox(es).
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Mailwasher - Over 8 million people use MailWasher as their spam filter
SpamResponse - Report spam text messages with the swipe of a finger. Getting annoying or suspicious text messages from unknown senders?