My two personal favorite Wi-Fi Inspectors are NetSurveyor and inSSIDer. Another great application is Xirrus Wi-Fi Inspector which is a powerful tool for managing and troubleshooting the Wi-Fi on a Windows XP, Vista, or 7laptop. Built in tests enable you to characterize the integrity and performance of your Wi-Fi connection. Applications include:
- Searching for Wi-Fi networks
- Managing and troubleshooting Wi-Fi connections
- Verifying Wi-Fi coverage
- Locating Wi-Fi devices
- Detecting rogue APs
Don’t forget about Vistumbler which offers GPS information.