osmocom's fosphor with patchvonbraun's multimode looking at ISM + FLEX pager bands with rtlsdr
Why the open web links it
Demonstrates real-time spectrum analysis using open-source SDR tools on various radio bands.
Linked by 2 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including hackaday.com, rtl-sdr.com.