Then if you don't limit it to amateur equipment there is of course the
commercial and military stuff, some of which is being used in the amateur
service. I believe Vertex is the mil/comm arm of Yaesu, and there is
Harris, and there is some stuff marketed by Motorola. Some of this stuff
a ham might disdain because it is designed for use by fairly untrained
people, and doesn't have the controls you might want for, say, a CW contest.
There is some amateur interest in the Automatic Link Establishment protocols,
which are built in in mil/comm gear and have been implemented in computers
for use with ham gear that is computer controllable.
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jhaynes at alumni dot uark dot edu