Repeater-START (Showing The Amateur Repeaters Tool) is an app to view nearby ham radio repeaters.
It runs on Windows, Android, Ubuntu Linux and Raspbian for Raspberry-pi, Librem Phone, Pinephone/Manjaro Linux etc.
a free and open map of wireless communicating objects
openBmap collects data and provides open maps and statistics of all communicating objects: cellular antennas, wifi hotspots.
All softwares from back-end to client are open-source under AGPL v3 license.