Propagation and Contesting:

- DX Notebook

- 3 hour K Index
- Solar information
- 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 - superb build quality

- DX Engineering - wide variety of products with prompt shipping
- Acom - beautifully built, high performance HF amplifiers - excellent customer support

- K4KIO HexBeam - premium quality with matching customer support

- Begali - outstanding CW keys

- Heil Sound - microphones for all purposes