I've made a live map showing #WSPR activity.
It gets the information from DX clusters, and can be useful to see how the band conditions are for a specific Maidenhead gridsquare.
https://g7vrd.co.uk/wspr/IO81
(Change the grid square on the end to yours).
It also supports two grid squares, which shows the WSPR traffic between two grid squares. E.g. https://g7vrd.co.uk/wspr/IO81/JO61
Useful for working out what band might be open between two gridsquares.

Public #satellite pass prediction #API. Supports REST/JSON, iCal and RSS
https://g7vrd.co.uk/public-satellite-pass-rest-api
#amateurradio

#Java CAT control library
https://g7vrd.co.uk/java-cat-control
#amateurradio

What is a contact?
https://g7vrd.co.uk/what-is-a-contact
#amateurradio

Simple #ARDOP #ARIM howto
https://g7vrd.co.uk/simple-ardop-arim-howto
#amateurradio

Simple #HF #APRS #digipeater howto
https://g7vrd.co.uk/simple-hf-aprs-digipeater-howto
#amateurradio

Simple receive-only #HF #APRS IGate howto
https://g7vrd.co.uk/simple-receive-only-hf-aprs-igate-howto
#amateurradio

#dx #websocket feed
https://g7vrd.co.uk/dx-websocket-feed
#amateurradio

#Winlink under #Linux
https://g7vrd.co.uk/winlink-linux
#amateurradio

IP networking over #AX.25 and #Direwolf under #Linux
https://g7vrd.co.uk/ax25-direwolf-linux
#amateurradio