Intercepter-NG might be a bit more popular than Wifi Analyzer. We know about 1 link to it since March 2021 and only 1 link to Wifi Analyzer. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I've not looked in to new apps in years, I still have access to the old free version of inSSIDer but I've also used Wifi Analyzer from farproc (Android only I believe). Cannot vouch for the quality or safety of either at this point. Source: almost 3 years ago
Interceptor-NG is a good tool for rooted androids http://sniff.su/. Source: over 2 years ago
NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting
Ettercap - Ettercap is a suite for man in the middle attacks on LAN.
inSSIDer - inSSIDer Essential makes it easy to maintain small business WiFi.
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
netcat - Netcat is a featured networking utility which reads and writes data across network connections...