SpoofCard - Disguise your Caller ID
Fake Caller ID - Fake Caller ID app provides users with a spoof caller id, and two free voice changer calls on a daily basis to make a call to their friends and pranks them in the voice of their girlfriend right at their fingertips.
Bad Numbers - A reverse telephone lookup of unwanted calls
Call Spoofer - Call Spoofer app helps users make a call on an unknown number by changing their caller Id, phone number, and voice to protect their privacy.
6degrees - Get introductions through your friends' phones
Juasapp - Juasapp – Prank Calls is a call recorder app so you can call your friends after changing your voice with the voice of a girl to record their reaction and share it with them to have fun together.