Apn4Apps disables mobile data when the screen is off and enables it when the selected application starts to run on the foreground

It's beautiful tool that allows you quickly enable or disable different settings.

The best toggle settings tool.

Amazing Android Battery Boost!

Droid Battery Booster is the best of breed Android performance booster. You can increase your battery life and improve your phone's speed instantly and automatically with Droid Battery Booster.

With Droid Battery Booster you can leave your charger at home, listen to more music, play more games, watch more videos and more.

Get the most out of your android device with Droid Battery Booster!

vLauncher is a free home screen app that lets you flick through pages of apps on home screen , manage apps more easily,iPhone style.

All android phones with 2.0 or newer os could run vLauncher.

After installation, Press Home button,click 'Use by default for this action' and then click vLauncher to set it default home.

Measures time spent on each app. See which apps to uninstall because you're not using them!
The most accurate app usage tracker! Accurate to less than a second on Android 1.6 and up.

Timesheet lets you track the times you spend on your various jobs.

Budgets is an Android application that helps you track your spending and keep to a budget.

Paperdroid is an offline article reading Android app that integrates with the excellent service Read It Later and/or Google Reader.
Found an interesting but long article while surfing in a costly internet point? Skimming hastily through your feeds for worthy posts? Just save the page to Read It Later (via bookmarklet, the Firefox extension etc.) or star it in Google Reader and have Paperdroid automatically download it to your trusty Android phone for offline reading pleasure - later.

This is a very simple but nice digital clock. You can put it on your nightstand to be informed about the current time at night.

The iClock android app is an exact replica of the iPhone's clock app. This is completely rewritten in Java for Android. Its has all the features that the iPhone version has.

ES App Lock can 
 ✔help lock apps on your device 
✔protect your private settings
✔prevent other people from seeing your messages,emails,photos,videos and all files 
With the help of ES App Lock, you may never worry about your parents, your friends , your workmates , your children or anyone borrowing your phone

Quick Questions is a FREE user/community based questions and answers app.

A High Quality voice recorder for wave and mp3 files.
Schedule a recording to start in background with screen off.

This Calendar Widget offers many sizes and shows as many events as possible.

An effortless way to track attendance
Are you an educator? Roster app lets you keep track of your students' attendance. Whether you are a college professor, workshop facilitator or a guitar instructor, forget clumsy piles of paper since your Android-powered phone is already in your pocket. More information on http://www.flapsapps.com/roster-android/
All features are available in demo, but you cannot add more than one class.
Requirements: Android 1.6+.