Applications running in the background on your Nokia N8 / C7 / 5800 / N97 consume enough memory. Unfortunately not all mobile phone users are aware of any series of hidden background application. Well, for that purpose you can just use a simple application called App Stop to shut down all background running task that Is not in the feature visible in the built-in task switcher. You can stop all background running application with two presses of button.
Download App Stop version of the Symbian s60v5 Here
Download App Stop the Symbian version of ^ 3 Here