Radiowave Propagation

Okumura, Okumura-Hata, COST-231 (Hata), and derivatives.

ITS Irregular Terrain Model (Longley-Rice)

IF-77 Electromagnetic Wave Propagation Model (Gierhart-Johnson)

FCC Point-to-Point Contour Prediction Method for FM Broadcast Stations

TIREM - Terrain Integrated Rough Earth Model (NTIA version)

Anderson 2D

CRC Predict - An implementation of the Fresnel-Kirchhoff pathloss prediction model. by Industry Canada, Communications Research Centre.

SCATS - Splatter, Clutter, and Target Signal Model - A radar-oriented propagation model developed by Information Systems Laboratories, Inc. (Vienna, VA).  For a given target/clutter scenario, it predicts the strengths of direct target returns, target returns which have been scattered by terrain features (clutter), direct signal from an interferer,  and interfering signals which have been scattered from terrain features (splatter or hot clutter). 
 

MiniMUF Model 

IONCAP Model

NTIA/ITS High Frequency Propagation Models

ICEPAC -  IONCAP with ICED profile model developed by NTIA/ITS.

VOACAP- IONCAP modified by USIA/VOA for broadcasting.
 

WBMOD Ionospheric Scintillation Model