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| https://www.qrz.com | Online logging site. very useful to keep track of contacts. | Free or $$ |
| https://hamstudy.org | Online ham license study. Uses flashcards, has practice tests. | Free, donations |
| http://www.arrl.org | if you don't know, then you should probably start with them :) | |
| noaa.gov/ ..d-rap | D-Region Absorption Predictions (d-rap) solar stuff | Free |
| Simon's World Map | link is for version I use - v1.2.3 there are newer versions | Free |
| Hamclock | for Raspberry Pi or other UNIX-like operating systems | Free |