HZ1JW Propagation Map
This tool provided by HZ1JW visualizes the behaviour of the propagation on the HF bands. Besides the information for the daily QSO chances, it is also a great tutorial to understand the interaction of the day-night cycles, the earth magnetosphere and solar activity. This platform is quite useful to show the dead zone. For the higher bands, the propagation waves are a good graphic tutorial for the hops. I do recommend this tool to explain the HF bands behaviour to ham radio novices.
Radio Coverage Simulation Platform