Just write, keep it simple!

Screen On allows you to keep the screen On/Off with simple Shake.

This is a tool upload your WhatsApp backup to your Dropbox account!
It features automatic upload at 4:15 am and 1 pm, a free to choose interval between the auto-uploads and more.

you can create your own formula with this app, and then input variables, you will get calculation result.

Auto Lock When You Need It! Phone locks when in your pocket...

This app allows to use the functions of android to automate and execute as tasks

Function Plot is a powerful and easy to use Android application, able to draw the graph of any function F, within a defined (x1, x2) space. The user of the application is able to get any “x, F(x)” pair values, by just touching the function graph on the device screen. Using this last facility, he/she is also able to approach the roots of the equation “F(x)=0”.

Fast Reboot. A way of simulating a phone reboot without doing it! Makes your phone run 50% Faster and smoother!

Complete and easy file manager for files and folders, with dual page view for fast transfers. Dual explorer allows you to easily browse the SD card.

Walk down the street with this application for search of free Wi-Fi.

Graph equations in different colors.

The simple battery level widget.

Simple note taking with a very clean design. Compatible with Tomboy & GNote Desktop note taking software.

ROOT Power File Manager is a powerful tool for any user with Rooted android devices.

This app merges low battery alarm and battery saver.

GCalendar Widget is a Free Google Calendar widget for Android Mobile phones... It has the Ability to show events from all your Google Calendars on your home screen. You can also add new Events

Disables the lock screen while using the apps you specify, re-enables it when you are done.

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

VLauncher - (for devices running 2.0 or above) Very nice launcher app developed over at voyagers. Much like Home Launcer but very fast ,snappy and stable.

Budget management tool