Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Castle - The easiest way to protect your users from getting hacked
Hiya - Know who's calling or texting and block spammers on Android
You've Got Spam - A new tool that lets you spam back the spammer
Credo360 - Figure out who to trust by looking at a social credit score
CallHero - Win the battle against robocalls with call screening