The testbench behind my bachelor’s thesis and the RoEduNet 2025 paper: it records very low frequency (VLF) radio noise from the live receivers streamed on abelian.org, and FM radio through an RTL-SDR dongle. It processes the noise into uniform random numbers and runs FIPS 140-2 tests on the result, next to the OS and random.org as baselines.
It’s no longer maintained, since abelian.org has gone offline.