Great Circle Maps

The Great Circle Map software GcmWin has been recently updated to support VOACAP and now produces colorful propagation maps as well as telling you which way to point your HF beam

SM3GSJ Great Circle Maps
http://www.qsl.net/sm3gsj/

GcmWin Download page
http://www.qsl.net/sm3gsj/download.htm

VOACAP - Free HF Ionospheric Communications Propagation Analysis and Prediction
http://www.voacap.com/