DLØGTH VHF/UHF/Microwave Contest Team dl0gth.de
DKØNA Clubstation and Contest Group dk0na.de
Webcam at Schneekopf in JO50JP schneekopf.panomax.com
IARU 1 VHF/UHF/SHF/Microwave Contest Results iaru.oevsv.at
Great Airplane Scatter Software from DL2ALF www.airscout.eu
German Amateur Radio Association www.darc.de
DARC VHF-,UHF,MW Contest Upload: https://dxhf2.darc.de/~ukwlog/upload.cgi?form=referat&lang=de
DX Conditions www.gooddx.net
DX Maps dxmaps.com
Troposheric Propagation Forecast tropo.f5len.org/forecasts-for-europe
Sporadic-E Propagation Forecast by G3YLA PropQuest
DL2AKT at pskreporter
ADS-B RX (DL2AKT feed into various networks):
ADSBHub: https://www.adsbhub.org/station.php?id=3320
Opensky: https://opensky-network.org/receiver-profile?s=-1408231534
Flightradar24: https://www.flightradar24.com/account/feed-stats/?id=44724
Flightaware: https://flightaware.com/adsb/stats/user/dl2akt
Radarbox: https://www.radarbox24.com/stations/EXTRPI252070
Finally, the site where I spent even more time than with amateur radio, my QRL xfab.com