Battery Saver , the professional power manager , is the best free battery saving app which is capable of extending your battery life. And package size is the smallest of all battery manager apps.

Memory Booster Lite Tablet Version - Android RAM Optimizer to Speed up Your Tablet!

Advanced App Manager is a featured tool set to manage your phone;

-Task Killer is easy and effective to speed up your phone
-Quick Settings is quick responsive for system settings
-Quick Uninstaller is fast to clean your phone
-Risk Finder is a protector for your phone
-Installer

A simple yet customizable clock widget with colorful semi-transparent background.

A simple battery widget to show exact battery level and charging status.
Battery Meter Widget shows the battery level and charging status in 1x1 space(same as size of icon). Battery Meter is a very lightweight widget i.e. only 64kb in size.

A simple yet customizable battery widget with colorful icon, text & background.

NetQin Mobile Manager will be a good call filter just for you. Block unwanted calls now and protect your privacy. Now with better developed features, you will no longer need to worry about privacy leak. Protect your private info 24x7.

2x2 Home screen clock widget displays time in a grid.
Features: Customizable color themes, Time or date display, Time zone selection, Tap for Configuration, Change size within the 2x2 space.

Speed up phone;
Save battery;
Auto kill & widget;

Quick App Killer is a tool to kill running tasks for speeding up your phone, saving your battery life;

Best task/app killer on Android Market.

Fast Task Killer
Simply stop and kill unwanted applications and processes free up memory and increase your battery life

Booster FREE is the coolest task killer for your Android mobile phone. Its easy and simple dashboard like interface saves battery life and optimizes system speed.

This is the Ultimate Application Killer. This app lets you kill running applications and system services. You can also back-up applications you’ve downloaded or uninstall them from your device.

Features include:
• Kill Running Applications
• Kill Running System Applications
• Hide Applications
• Uninstall Downloaded Applications
• Backup Applications

Short for MTK, Mobo Task Killer can also be known as a task killer, task killer manager, app killer or service killer etc. It helps manage your phone system’s running apps and services. If your phone often runs slowly or battery is exhausted so soon, our task killer will be an ultimate choice app to kill tasks, free memory, and speed up your phone as well as save battery.

There are many applications that automatically start when you turn on your device; many of these you don't use or need, they just consume your valuable resources. Autorun Killer lets you manage applications that start up when you boot your device. Donate version even tries to prevent their restart (and is ad-free).

One-stop task manager. Monitor and kill task, speed up phone, and save battery.

1*1widget to monitor memory usage.
search&sort task by name.
auto-kill task when screen off.
ignore app when kill.
vivid online help.

1. Highly customizable Messages at contact, contact group and phone level.
2. “Reject call with/without message“.
3. Messages are sent only to mobile numbers. Some apps doesn't differentiate mobile and land line numbers.
4. Flexible and fully customizable modes.
5. Emergency calls support.
6.Schedule Reject: You can disable call reject after a scheduled period of time.
7. Read out call log
8. With new version, all annoying full screen ads are removed

Simple Task Killer allows user to safely end running applications.

A variety of powerful system tools and utilities to get things done on Android.

Linux Terminal for Android. Run Linux command on your phone and install external android apps.

Is very useful for those who want to change application without close the current one.
Is also a good memory optimizer, the let you kill or free the memory space of other application,and fill it back when you open it again.
You can enable or disable bluetooth, wifi, wifi hotspot ,data traffic,airplane mode,gps,vibrate mode with one click.
Also open a new application in a very simple and fast way.
And you can customize it with whatever images you want.