Going off google translate here....
>>1"What applications are good for Android?"
-Google Drive
Gives you a free 5GB cloud storage where you can upload/ download anything on your phone. Also check it out on a desktop, easier to use there.
-ES File Exporter
This allows you to move, copy, paste, and delete files right off your phone, as if you had it plugged into a computer.
-Skype
Because Skype on a phone.
-Flashlight
Obvious reasons here, uses camera flash as a flashlight, quite helpful.
-Sketchbook Mobile Pro
High-end image creator/ editor. Allows you to draw, has a lot of features, allows you to layer images, almost everything photoshop can do. It's really quite impressive.
-Soundhound
Simply use it to identify any song you hear on the radio, in the car, ext.
-Quickoffice
Should come standard with almost any android phone: it is a microsoft word and powerpoint creator/ editor. With the preinstalled version you can make word documents, and view .doc's and .ppt's.
-Wolfram Alpha
If you've never used the site before, it can solve almost any problem you ask it. Typically used for calculus.