Propagation and Contesting:

- DX Notebook

- 3 hour K Index

- Space Weather
- Solar information

- ARRL Contests Portal
- WA7BNM Contest Calendar

- DX Summit

Organizations: 

- American Radio Relay League (ARRL)

- Radio Amateurs of Canada (RAC)

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

Websites:

- Balun Designs - superbly built, high quality products

- Acom - beautifully built, high performance HF amplifiers - great factory customer service

- K4KIO HexBeam - premium quality product with matching customer support

- Begali - outstanding CW keys