Inne

IMO supports and works well alongside other big instant messaging names like Yahoo!, AIM, Google Talk, Facebook Chat, and MSN Messenger. It basically lets you chat instantly with all your contacts in the aforementioned social networking sites. This saves you a great deal of time and effort as it absolves you from the need to log in to those sites separately.

Other than sending and receiving instant messages, the app also lets users make and receive video and voice calls, for free! At the end of 2017, the app had been downloaded 500 million times especially by the younger range of teenagers.
http://furybyte.com/imo-free-video-calls-and-chat/