Description
Fldigi is a modem program which supports most of the digital modes used
by ham radio operators today. You can also use the program for
calibrating your sound card to WWV or doing a frequency measurement
test. The program also comes with a CW decoder. fldigi is written with
the help of the Fast Light Toolkit X GUI. Fldigi is a fast moving
project many added features with each update.
Flarq (Fast Light Automatic Repeat Request) is a file transfer
application that is based on the ARQ specification developed by Paul
Schmidt, K9PS. It is capable of transmitting and receiving frames of
ARQ data via fldigi.
Version
v4.2.11Dec 19, 2025