Viber Android (free) and iOS (free)

With Viber, everyone in the world can connect free of cost. More than 400 million Viber users text, call, and send photo and video messages worldwide over Wifi or 3G. Viber can be used to make calls to non-Viber mobile and landline numbers at low rates.

Viber is available for many smartphones and platforms and is also compatible with Android tablets as well. On Viber, your phone number is your ID.

The app syncs with your mobile contact list, automatically detecting which of your contacts have Viber and you can text your friends, make free calls/video calls, voice messages and groups up with up to 100 participants at one.

Cyber Dust Android (free) and iOS (free)

Cyber Dust is a more natural way to message. Messages get deleted within seconds, and never reach hard drive, so your conversations stay private and totally untraceable.

Send photos, discuss confidential information, important business, or every day conversations you don't want to be made public. Then, watch your messages vanish forever, seconds after you send them. Screenshots are disabled on Android giving you extra security.

TripIt Android (free) and iOS (free)

Triplt is an app which helps you in organizing your trip in a descent way and does not let you bother you much about anything else related to the trip plans.

The app provides you with a summary of your plans at one go, and it gathers all information by going through your mail box, travel-related receipts or anything related to your travel plans.

All your reservations, flight schedules, meetings will be there to keep you reminded of all the important things of the trip. The TripIt Pro service ($49 per year) adds must-have features such as real-time flight alerts, flight-refund notifications and more.

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