FlashDroid is an open source educational app to convert your screen into a bright flashlight. Want to learn how to make an app like this?

AndPizza is an Pizza/Egg-Timer for Android. The time can easily be adjusted to a desired duration. When the time ran out, the phone will vibrate and an alarm will sound.

Crack the code! Validate credit cards numbers and extract useful data from them.

Control screen brightness from any app. Simply press the volume rocker to display a brightness slider. Or use the home widget or notification icon.

Best in Android 2.2, slower in 1.5-2.1.

Visit http://brightness.superfacts.org for more info.

v1.2: Integrates with auto brightness and fixes misc bugs.
v1.1: Fixes voicemail pausing bug.

A free simple widget(1x1) to change the ringer mode to Normal, Silent and Vibrate mode in 1-click and also you can switch on/off your WiFi.

Turn your android phone into a wireless mouse and keyboard for your computer.

As also found in the official Google Android Market:

This application is a call minutes, sms, mms and data usage meter to monitor your credit usage. Never exceed your quota again!

Supporters unlock: free times/contacts/groups; widget; usage log; greater configuration of plan inclusions + more. A free 5 day trial is offered.

Please report bugs!

Please visit http://creditusage.matthewwardrop.info for more information.