flcluster can connect to and display data from DX cluster servers. The three
most common server types are A←-R-Cluster, CC-Cluster, and DX Spider. The
program is designed to work stand alone or as a helper application to fldigi.
It can move call, mode, and frequency data from a spotted QSO to the appropriate
fldigi controls. It can query fldigi for the same items when generating a spot
report.