Network Survey
Android app that surveys cellular (GSM, CDMA, UMTS, LTE, 5G NR), Wi-Fi, Bluetooth, and GNSS. Open source under Apache 2.0.
What Caskfive makes
Mostly tools for finding out what's on the air, plus a few that wandered off in other directions.
NS Analytics
Web platform that puts every phone's Network Survey data in one place, on one map, ready to dig into or export as CSV.
VectorOn
Indoor positioning for security teams in high-rise buildings. Survey each floor once, then see where each guard is on the floor plan, from the Wi-Fi already in the building. No new hardware. For the operator who needs to know which floor each guard is on, not just a latitude and longitude.
WaveDigger
Free web tool that shows where a Wi-Fi access point or cell tower has been reported. Enter a BSSID or cell identifier and see where it has been observed.
PingCheck
A simple Android ping utility with latency charts, saved hosts, and history. Nothing leaves the phone except the pings and the DNS lookups they need. Open source under GPL-3.0.
Taktrix
End-to-end-encrypted, decentralized chat plugin for ATAK, built on Matrix. Runs against any Matrix homeserver, including one you host yourself.
Stromma
Streams an Android device's screen or camera to an RTSP server. Video is H.264 so browser-based viewers can play it; audio is optional and off by default.
VBoard
An Android keyboard you talk to in one language that types in another. Distributed privately through managed Google Play.