KakaoTalk for Android is a fast and multi-featured messaging app that sends messages, photos, videos, voice messages and your location for free.
Mocha for Android, Mocha is a free unlimited SMS, Call Out messaging application, even for those who have not installed Mocha or installed but are not online.
Viber for Android is a free messaging app that helps you connect with people around the world over the Internet (using WiFi or a data plan).
Zalo for Android, Zalo for Android has just updated the new version to upgrade the general search feature, support creating arbitrary stickers and setting up notifications in the chat group