You've Got Spam - A new tool that lets you spam back the spammer
Castle - The easiest way to protect your users from getting hacked
Mail Dump - Powerful Extensions for email addresses extracting, verifying and finding
RoboStopper - Block spam calls or get paid for them wasting your time
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
CallHero - Win the battle against robocalls with call screening