Most smartphones have a reset button you can use to restore your system's default settings without losing personal data. Typically, you have to insert your stylus or something paper-clip-like into a recessed hole to achieve the soft reset. While this is fine to do once or even occasionally, if you're resetting often you can protect your smartphone's interior by using a third-party software package to perform a reset.
SoftReset does just what the name suggests. It's $2.80
Reset is a simple, cheap program intended to reduce wear on Smartphone hardware. Like SoftReset, it lets you perform the task without using the button. The utility costs $1.50
HandyMenu lets you control power-off, soft and hard resets and offers other functions. More robust than the others, it costs $5.99.