[fr0sty]

There are many more of these: http://websdr.org/

Be sure to check several. Receive capability is not the same across stations or between frequency bands on the same SDR.

[themodelplumber]

Yeah, it's sometimes even a bummer to filter by desired frequency band and realize just how limited the options can be. Building a shack at home is a fun project though, and you can target any bands you like.

[riffic]

it's a shame the author doesn't seem to be interested in opening up their source code:

http://www.websdr.org/faq.html

edit: previous HN discussion regarding PA3FWM's closed source stance:

https://news.ycombinator.com/item?id=18571139

[bjakubski]

For a very similar, but open source project have a look at https://github.com/jketterl/openwebrx