Extracting .apk files from your Android

Using a file manager like "EStrongs File Manager" or "ASTRO File Manger" (downloadable from the Market)

• Prerequisite: Rooted device

Using ES File Manager

• Open ES File Manager
• Click on the menu button of your device
• Click on "Manager"
• Click on "App Manager"
• Long press on app you want to extract
• Click on "backup"
• Extracted .apk files will be placed on the "backups" directory of your sd card

Using ASTRO

• Open ASTRO File Manager
• Click on the menu button of your device
• Click on "tools"
• Click on "Application Manager/Backup"
• Choose apps to backup and click on "backup" to finish
• Extracted .apk files will be placed on the "backups" directory of your sd card

ENJOY!!!

ASTRO File Manger Download link       

ASTRO file manager