From the TenTec reflector by Duane, AC5AA

Since the subject of rig control and logging software has been brought up, I'd like to pass along a recommendation out of my experience. I've used several of the currently available logging programs and have found one which is outstanding in both performance and support. It is DX4WIN, and it supports rig control on all the current major transceivers as well as logging, log checking on needed DXCC/WAZ/WAS/(etc) stations, etc. It is a Windows 3.1, 95 or NT application. I can't begin to describe all that it has to offer. It is priced well, and the function it provides is outstanding. It is simple to use, yet very powerful. Support is head and shoulders above the others I've tried. You can check it out for yourself at the url below, and even download a trial copy (some functions disabled...). This is easily the best software for the ham station that I've found or used. 

73, Duane AC5AA (disclaimer: I am not associated with the developers / marketers of this software in any way except as a very pleased customer)