This app allows you to practice typing into your Android tablet or phone.
It has a built-in timer, so that you can measure your speed and accuracy.

It stores your best times, so that you can monitor your progress and see improvements in your speed and accuracy.

Also, you can use this app to quickly test the on-screen keyboard, or physical keyboard, on any Android device.

It is a game where you take control of a spacecraft that is able to monitor space objects. In this case the object is a asteroid.
Your goal is to create chaos in the Universe and destroy every last remnant of existing civilization in the galaxy. With a gameplay similar to classic brick-breaker games, you must destroy all barriers and scroll through 100 levels divided by three campaigns (Milky Way, Orion and Andromeda).

Essential app for all android users. Password protect your phone's personal data

An essential app for every android user. Password protect any personal data on your phone.
AppLock lets you protect any applications you want with a passcode: SMS, Email, Pictures, Calendar...any apps you choose

Free, top-rated, real-time antivirus and anti-theft protection for Android™ devices.

Reach your Android’s maximum potential by increasing speed, saving battery power and monitoring data usage with NetQin’s Android optimization app. Android Booster FREE will improve your Androids performance in seconds with it’s easy to use interface by helping you reclaim memory, save battery power, kill tasks and give you an easy way to uninstall unwanted apps. Android Booster also contains a handy Widget which gives you the power of one-click optimization.

    安安卜是一款集文件管理、任务管理、来电防火墙、短信过滤、网络管理、数据库管理、垃圾清理、开机加速、内存管理、监控器于一体的Android管理软件，全面管理android系统问题。
    AndBox is a set of files management, task management, call firewall, SMS filtering, network management, database management, garbage clean, boot speed, memory management, monitor management software, Overall management of the android system problems.

More http://code.google.com/p/andbox/
https://www.slideme.org/user/18222/applications/18222

AirCover Security protects your Android devices from viruses, malware and other threats, with anti-virus, real-time protection, web protection, anti-surveillance, and other security features.