 Software Defined Radio | |
 SDR-radio.com | |
| WebSDR.org | |
| PA3FWM's software defined radio page | |
| High Performance Software Defined Radio - An Open Source Design | |
| Gqrx SDR | |
| SDR w Zielonej Górze | |
| Konstrukcje cyfrowe SDR | |
| SDRadio by Alberto I2PHD | |
 Krótkofalarskie konstrukcje cyfrowe | |