HDXCCthe Hoosier DX and Contest Club
Online Resources
Prop Summary
My favorite software for determining current and future propagation is W6ELProp. W6ELProp can display a propagation table between any two points and has a batch mode which is great for contesting. Another feature I really like is the frequency map which shows the MUF across the world by shading a world map with various densities.

W6ELProp can use either the Solar Flux or Sunspot Number. However, a better number to use is the Effective Sunspot Number (SSNe). The SSNe is an adjusted number that is more accurate than using just the Solar Flux or Sunspot Number.

I finished the links by giving you two pages with a conglomeration of propagation information.

-David / N9KT