HamCAP HF propagation prediction tool for Amateur Radio
HF Propagation and Solar-Terrestrial Data Website
HF Radio Propagation - Tools You Can Use - Making It Up
Review of Propagation prediction programs - VOACAP-based
2020 Extra Class study guide: E3C – Radio horizon; ground wave; propagation prediction techniques and modeling; effects of space weather parameters on propagation - KB6NU's Ham Radio Blog
Radio Coverage Prediction - Resource Detail - The DXZone.com
DX Toolbox - Shortwave / Ham Radio / HF Radio Propagation Tool
ACE-HF PRO version 2.05 Review from HAM Operator's Viewpoint
Some Great Propagation Calculator Websites. - Off Grid Ham
G0KYA's Amateur Radio Blog: Running Propagation Prediction Software on Mac OS X