Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
YoruFukurou - YoruFukurou (NightOwl) is a Twitter client for Mac OS X, designed for Twitter addicts.
CallApp - Free Caller ID & Call Blocker app that allows mobile users to block phone calls, identify calls, blacklist unwanted callers and much more.
Janetter - Janetter is a Twitter client application. Faster, smarter, and more powerful.
CallerSmart - CallerSmart is an application that is basically used for the purpose of looking up mystery phone numbers for free.
Harpy for Twitter - Harpy for Twitter is an Android app developed using Flutter to provide a smooth experience.