I0JX ClusterMaster https://www.qsl.net/i0jx/

HamScope Digital Communications Interface https://www.qsl.net/hamscope/

RxClus version 8.5 (last checked 28 March 2023) www.hb9bza.net/rxclus-overview

W6EL Prop - Propagation prediction https://www.qsl.net/w6elprop/

Antenna modeler and optimizer https://www.qsl.net/4nec2/

Air Cored inductor calculator https://m0ukd.com/calculators/air-cored-inductor-calculator/

ARRL http://www.arrl.org/

Antenna analyzing http://gal-ana.de/basicmm/en/

Azimuthal map https://ns6t.net/azimuth/azimuth.html

Bamberg B05 Club https://dl6nbs.lima-city.de/html/b05.html

Circuit simulator http://lushprojects.com/circuitjs/circuitjs.html

Inductor code calculator https://www.electronics2000.co.uk/calc/inductor-code-calculator.php

Resistor code calculator https://www.allaboutcircuits.com/tools/resistor-color-code-calculator/

Cross reference industry standard components https://www.chipfind.net/crossreference/

WA7BNM contest calendar https://www.contestcalendar.com/weeklycont.php

G4UCJ digital modes http://www.hfradio.org.uk/html/digital_modes.html

eQSL https://www.eqsl.cc/qslcard/index.cfm

Fists CW (Morse Code) Club https://fists.co.uk/resources.html

Flex-MORSE http://morse.ua4.ru/

FlightRadar24 (tracker) https://www.flightradar24.com/ 

G4FON Morse training http://www.g4fon.net/CW%20Trainer2.php

GQRP https://www.gqrp.com/index.htm

Great Circle calculator https://www.gpsvisualizer.com/calculators

K7MEM calculators https://k7mem.com/index.html

HamShop CZ https://www.hamshop.cz/

IFree radio network https://freeradionetwork.eu/

International radio network https://irn.radio/

IOTA map https://www.iota-world.org/iotamaps/

KiCad EDA Schematic capture https://www.kicad.org/

Kiwi Wideband Shortwave receiver map http://rx.linkfanel.net/

Lat/Long finder https://www.latlong.net/convert-address-to-lat-long.html

LC Impedance matching http://leleivre.com/rf_lcmatch.html

Line of sight plotter https://www.scadacore.com/tools/rf-path/rf-line-of-sight/

Marine Traffic (Tracker) https://www.marinetraffic.com/en/ais/home/centerx:1.9/centery:51.6/zoom:6

Martin Lynch and Sons https://www.hamradio.co.uk/

German Navy nets https://mf-runde.de/en/association-en/bulletin-and-scene-of-action/?cn-reloaded=1

MK Raynet http://www.mkraynet.org.uk/

Moonraker https://moonrakeronline.com/

Morse code game https://morsle.fun/help

QRZ https://www.qrz.com/

Rapid deployment Amateur Radio RaDAR https://radarops.co.za/

Radioworld https://www.radioworld.co.uk/

Rapid Electronic Components https://www.rapidonline.com/

Resonant frequency calculator https://www.1728.org/resfreq.htm

Return, Loss and mismatch calculator https://chemandy.com/calculators/return-loss-and-mismatch-calculator.htm

RF experiment https://sites.google.com/site/linuxdigitallab/

Speed training CW https://www.rufzxp.net/

Solder Smoke Podcast https://soldersmoke.blogspot.com/

SOTA https://www.sota.org.uk/

World Castles Award http://wcagroup.org/

World Wide Flora and Fauna https://wwff.co/