Amateur Radio Practice Exams
eHam
Ham Education
Technician
General
Extra
QRZ
Zoom Exam

Callsign Services
ARRL
HamCall
QRZ

CW
10 10 International
CW Abbreviations
CW Contests
CW Fists Club
CW Signal Report
CW Parks on the Air
NAQCC
SKCC

DMR
Active Talk Groups
ID Search
KH7MS Network
Register
What is DMR

HF
Callsign Numeral Prefixes USA
Callsign Prefixes International
FT8 Basics Explained
Introduction to DXing
PSK Reporter
Winlink Digital Mode

Internet Communication Wordwide
AllStarLink & AllStarLink Node List
DVSwitch Mobile (Android) & Transceive (Mac) AllStar Apps
EchoLink & EchoLink Online Nodes
Peanut (great audio) & Rooms in Peanut

Satelite & Space Station
Amateur Radio in Space
AMSAT Online Satellite Pass Predictions
ARISS SSTV Blog
N2Y0
Spot the Station

Software
Digital Level Meter
Fldigi
MMSSTV
PinPoint ARPS
Soundmodem
Vara FM & Vara HF
Winlink Express
WinLink Digital Frequencies Map

Solar
NASA Solar Storm & Space WX
Solar Ham
Space Weather News