Firstly there is the offical US FidoNet home page.
Try the history of FidoNet to find out how it all started in the first place.
Another (perhaps more comprehensive) fidonet page.
This time a page covering the PENPAL_UK fidonet echo (one of the busiest on fidonet)
This is supposedly the complete Nodelist, but be warned the description is in German.
The full list of my published Software
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Copyright 2021 Colin StewartEmail: colin at owlfish.com