multimon-ng a fork of multimon.
It decodes the following digital transmission modes:

  - POCSAG512 POCSAG1200 POCSAG2400
  - FLEX
  - EAS
  - UFSK1200 CLIPFSK AFSK1200 AFSK2400 AFSK2400_2 AFSK2400_3
  - HAPN4800
  - FSK9600
  - DTMF
  - ZVEI1 ZVEI2 ZVEI3 DZVEI PZVEI
  - EEA EIA CCIR
  - MORSE CW

As an example it can be used with rtl_sdr to decode radio amateurs packets:
rtl_fm -f 144.390M -s 22050 | multimon-ng -v 10 -t raw -A -

WWW: https://github.com/EliasOenal/multimon-ng