I thought some members might be interested in experimenting with this software. The page has a full description, but the software will model the propagation on a selected HF band and show the expected propagation based on historical data back to 1900. It can also obtain real-time data from WWV and use it for a live assessment of the band. It also shows a daily point to point chart showing the best time and frequency for communication between the two locations.
NOTE: Read the installation details completely.
Submitted by KW1LL