Propagation and DX:

- DX Notebook

3 hour K Index
Solar information
WA7BNM Contest Calendar

DX Summit

Amateur Radio Organizations: 

American Radio Relay League (ARRL)

- Radio Amateurs of Canada (RAC)

Radio Society of Great Britain (RSGB)
International Amateur Radio Union (IARU)

Interesting Websites:

Balun Designs - superb build quality
Acom - high quality HF amplifiers
- DX Engineering - very customer focused - great service

- Flex Radio Systems - best of the software defined radios 

- Elecraft - superb products with customer service to match

- OptiBeam - high performance - German quality engineering

- Begali - outstanding CW keys

- TelePost - every Ham shack needs a digital station monitor