iStumbler Labs
https://istumbler.net/Wireless Intelligence
iStumbler is the leading wireless discovery tool for Mac OS X, providing plugins for finding AirPort networks, Bluetooth devices, Bonjour services and Location information with your Mac. Targeted to pro-users and administrators, iStumbler allows you to quickly solve wireless problems and monitor performance over time.
Angel list: https://angel.co/company/istumbler
Member count: 1-10