Droidlock is an Android app that allows you to password protect individual apps on your Android devices.
This is a useful feature if you allow your kids to play games on your phone or tablet and they accidentally get into your email and delete some important stuff.

This is also another line of defense to protect your data in the event that your device is lost or stolen.

“To protect an application, select the DroidLock application from your Android device’s launcher then press the MENU button and select the “Add application” menu item. A listing of all installed applications will appear.”

“Selecting an application will enable protection and return you to the listing of protected applications. Applications that are already being protected will appear in the list greyed-out and non-selectable.”

You can grab droidlock in the Android Market or you can read more details at droidmate.com

Aleatory Password Generator for Android is a super small app that will generate random passwords for you whenever you need them. Based upon your selected criteria, you can have passwords that contain upper and lower case letters, numbers, special characters and whether or not characters can repeat. Having a strong password can help deter identity theft, take a look at types of identity theft defined at LifeLock.com, they go in depth a little more.
You also can choose the number of characters to use for your password. (Application will force close when trying to generate 1 or 2 character passwords)

I only have one problem with random, complicated passwords…they are friggin hard to remember! You will wind up writing it down somewhere, which defeats the entire purpose of creating a secure password.

Get Aleatory Password Generator

https://market.android.com/details?id=com.mobkids.aleatorypasswordgenerator&feature=search_result