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4. KakaoTalk by Kakao (South Korea)
An alternative to WhatsApp, this Internet Protocol-based (IP) app allows for unlimited voice calls and text messages, group chats with your colleagues, and the ability to share of multimedia content such as photos with project group members.
5. AutoSMS Smart by Kamal Nivas Balasubramanian (India)
Missed an important business call? With AutoSMS Smart, users can help manage the caller's expectations by them sending automated text messages. Specific instructions can be included such as having messages sent to only numbers included in your phonebook, and restricting the app from sending messages to international or landline numbers.
6. Handrite by NC Corp (China)
Price: Free for lite; US$3.05 for pro version
A note-taking app that lets you use your fingers to "write" on the screen, this is useful in situations when you need to scribble down notes in a hurry and finger-typing is too slow.