This week, Amazon unveiled an Appstore for mobile devices that run on the Android operating system. Here are three business-friendly offerings currently available in the store:  

Using this app, you can scan multiple documents with your phone's camera and turn them into a single PDF that you can store on your phone and e-mail to your main computer. Cost: $4.99

This app replaces your standard Android keyboard, and accurately predicts the next word you are most likely to type based on what you've already written. The software learns as you use it, so predictions become even more accurate over time. Cost: $1.79 

Want to keep prying eyes away from your phone? This security tool lets you lock individual apps on an Android device, protecting them with passwords without locking your entire phone. The app has a simple interface that makes it easy to add or remove apps from your protection list or change your passwords. Cost: $2