Working with PDF files on the go is both free and easy. You can fill out forms, sign documents, and make comments right from your iPad, iPhone, or Android™ device.

http://www.adobe.com/products/reader-mobile.html

Easily translate between over 50 languages instantly.

http://www.google.com/mobile/translate/

Make free calls and text messages internationally.

www.viber.com

Read and create QR codes easily with this great app.

http://www.beetagg.com/en/beetagg-qr-reader/

Waze is the world's fastest-growing community-based traffic and navigation app. Join other drivers in your area who share real-time traffic and road info, saving everyone time and gas money on their daily commute.

http://www.waze.com/