WinPhone Info displays information about your Windows Phone device. It combines multiple sample apps into a single, Metro-styled interface. Additional information, such as battery status, will be included as it is made available to developers
Device Info - Device Info will display basic information about your Windows Phone, including the hardware version, device name, and other data. The application will also allow you to turn on location services and see your latitude, longitude, speed, and altitude as reported by your device
System Information is an application that strives to bring you the most informative properties currently provided by the phone's framework.
Features:
Device specific information
External IP Address Lookup
Versions History
Export properties using e-mail
This free application is also free from adds