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UK (not a map, similar view to what the signallers see): https://traksy.uk/live/M+58+STIRLNG

Australia and New Zealand: https://anytrip.com.au/

(although it also includes some buses and ferries, and you can only look at one region at a time)

Yandex has it for (mostly Russian) trains that it has on schedule.

I love that the map doesn't show any borders

In many Russian policies, the concept of a border is definitely lacking.

We've got too many of these in 1991 and think we can spare a few now.