Nightly - One part dating, one part social, one part nightlife
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Atmospheir - Fastest way to discover, connect and chat with your contacts
CallApp - Free Caller ID & Call Blocker app that allows mobile users to block phone calls, identify calls, blacklist unwanted callers and much more.
Bad Numbers - A reverse telephone lookup of unwanted calls
CallerSmart - CallerSmart is an application that is basically used for the purpose of looking up mystery phone numbers for free.