- ARRL: the national association for amateur radio
- FCC Amateur Radio Service
- HamStudy.org: exam practice
- QSO One: free app for Android, Windows and iPhone (iPhone beta via TestFlight) for joining AllStarLink, EchoLink, DMR, System Fusion and other nets and talkgroups without a radio
- QRZ.com: call sign lookup
- RepeaterBook: repeater directory
- PSK Reporter: propagation via digital-mode spots
- Solar & band conditions
Elk River Valley Amateur Radio Club
Amateur radio in the Elk River Valley