Also Chipnik in NL, discontinued several years ago. Too fiddly, nobody worries about privacy any longer.

https://en.m.wikipedia.org/wiki/Chipknip

In Germany, there's GeldKarte. Still relatively widely supported on public transportation ticket machines and cigarettes vending machines, so they can be used offline.

I found it awesome to use with at-home recharging (with an appropriate card terminal) and use on trains. Often, the ticket machine would refuse coins or not have change. Electronic payment to the rescue! :)

Unfortunately, its fate is already sealed with basically all banks having announced their withdrawal from the system.

https://en.wikipedia.org/wiki/Geldkarte