NetStumbler is a tool for Windows that allows you to detect Wireless Local Area Networks (WLANs) using 802.11b, 802.11a and 802.11g. It has many uses:
- Verify that your network is set up the way you intended. - Find locations with poor coverage in your WLAN. - Detect other networks that might be causing interference with your network. - Detect unauthorized "rogue" access points in your workplace. - Help aim directional antennas for long-haul WLAN links. Use it recreationally for WarDriving.