Radiola - rtlsdr expermintal SDR
Experimental rtlsdr software to play with small and nifty tv-tuner dongle.
Now implemetend SDL2 waterfall diagramm, terminal waterfall diagramm also is possible to demodulate wbfm and listen to radio stations.
git clone http://git.main.lv/cgit.cgi/radiola.git
For Linux should work out of the box with NetBSD needed some small tweaks.
for NetBSD (or any other *BSD, MacOS could work as well) just try