I'll add some other software recommendations along the more visual route. For those on Windows, SDR# [1] is pretty great. On Linux and Mac, I really enjoy using GQRX [2]. And finally, when you're digging deep down into a received signal, inspectrum [3] can't be beat.
[1] http://airspy.com/download/ [2] http://gqrx.dk/ [3] https://github.com/miek/inspectrum