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: http://contest.darc.de/v_upld/prg_list.php?reset=1&PHPSESSID=3e236fb587b411b82cc6e082a31aae5e
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 www.pskreporter.de/table?call=DL2AKT
ADS-B RX (DL2AKT feed into Opensky network): https://opensky-network.org/receiver-profile?s=-1408231534
Finally, the site where I spent even more time than with amateur radio, my QRL xfab.com