Simplest and easiest to use Cell tracker application in the Market. This app is among Top 30 Free Android apps in Android Market.
Track any Android phone by installing this app in that phone. You can track where your children are by tracking their cell or keep a check on your spouse or if you simply want to track where all you have been through in last few days all you need to do is install this app. No need to turn on the GPS. This application sends location info once every 30 minutes through GPRS/Wi-Fi and hence the impact on battery is minimal.