Using Androzip File android apps you can save your installed apps as a apk file; .apk files are just like .exe file in windows with the help of them you can install an app without accessing android market.
This is very useful android apps when you want to free up your phone memory to install some big size app, or when you have to factory reset your android mobile. You can take a backup of all your installed apps using Androzip File android apps and again install them from apk files those were saved in your mobile’s SD card.
You can install Androzip File manager from this link in your mobile’s market, after installing , go to app manager in Androzip File manager ( a gear icon); check the installed apps to be saved as .apk and click on backup; now your checked apps will be saved as .apk files in your mobile’s sd card at this location app_backup.
Now you can uninstall your desired apps from your android mobile and when you need again those apps just install them from your sd card.
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