The FT-991 Memory Manager is a freeware program created by F6ECN designed to assist in managing, programming, and remotely controlling Yaesu FT-991 and FT-991A ham radio transceivers. It is compatible with Windows 7 through 10, on both 32 and 64 bit systems. While the primary user documentation is in French, the software’s latest version, 2.2.7.5, is available for download.
Even if outdated (2002) and unsupported this freeware acars program promise to do the job. HFDL is a HF data link protocol, defined in ARINC spec 635-3 Developed by Charles Brain. Donwload PC-HFDL
The Yagi Designer program was first developed in 1992 on a DEC-Vax 3100 and written in Fortran, and the output was graphed in Mathematica 2.0. It has since been converted into a DLL with lightning fast speed compiled in the C language. It was written by a physicist that has always enjoyed dabbling in radio.
D-Rats 0.3.3 for Windows – Free download
Ham Radio Deluxe 5.x latest free version of ham radio deluxe