VOACAP is a free web tool that allows you to punch in any two locations along with the station parameters and visually see your chances of making a contact between those two locations at a given time of day along with MUF. The other tool shows you your coverage or "footprint" on the map on a specified band. These are some of the most well written and useful prediction tools I've encountered. Check it out!
VOACAP Quick Guide: HF Propagation Prediction and Ionospheric Communications Analysis
VOACAP Quick Guide: HF Propagation Prediction and Ionospheric Communications Analysis
