This is a radio amateur (HAM) digital mode program for use with a radio transceiver, to communicate with others, fldigi is the main package
This is the homepage: http://www.w1hkj.com/
This is the download page (tar.gz source is there with version numbers): http://www.w1hkj.com/files/fldigi/
There is no similar package in Solus at the moment, I like Solus and would like this "fldigi" to be included :-)
Radio amateurs like to use this program, it is Open Source, and may be distributed, the Gnu General Public License is in place (see the file COPYING in the tarball)
This is the latest tar.gz: http://www.w1hkj.com/files/fldigi/fldigi-4.1.09.tar.gz
Thank you!