NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.

Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.

Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI

WhosCall - WhosCall is a reliable caller ID app whose popularity has led to its adoption by many users including international media. You can now manage the numbers calling you regardless of whether they are part of your contact list or not... read more.

ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.

CallApp - Free Caller ID & Call Blocker app that allows mobile users to block phone calls, identify calls, blacklist unwanted callers and much more.