Gascop is a lightweight POCSAG decoder for use with rtl-sdr devices, which is heavily inspired by dump1090 and is currently under development mainly as an exercise in processing data from rtl-sdr devices.
Gascop does not use any part of the GNU Radio stack (not that there's anything wrong with it / some of my best friends / etc...), and thus is very easy to build and use.
If you are interested in the theory behind the code, take a look at the wiki.
$ make$ ./gascop 123450000 # for listening on 123.450 MhzCopyright (c) 2013 by Yuval Adam, based on work by Salvatore Sanfilippo, all rights reserved.
Gascop is free for use and distribution under the BSD license.