If you're looking to learn another language, Duolingo gamifies language learning with bite-sized lessons and a friendly interface. Starting with simple vocabulary and building from there, Duolingo is your guide to learning a new language or brushing up on one you already know. The more you use the app, the more you unlock and—with practice—the more you learn. This free app currently supports Danish, Dutch, French, German, Irish, Italian, Portuguese, Spanish, and Swedish. Or more practical choices, like Esperanto and Klingon.
Microsoft Word is, simply put, the alpha and omega of word processing, and one of the key apps in Microsoft Office 365. You'll find it on every kind of computer in every kind of setting, and now it's available for free on Android. Word plugs into Microsoft's cloud infrastructure to keep your documents in order, but its main selling point is that this really is Word. What you make on your phone will look exactly the same on the desktop. For the worker on the go, it's essential. Droid Apps