(and hopefully "on topic" for this list)
The RIPE Atlas map of PNG shows 1 connected and 9 abandoned probes:
(you can click on the abandoned legend to show the abandoned probes)
so there is an opportunity for network measurements (ask if you want credits to run tests and don't have a probe of your own to earn credits).
These probes are abandoned - but can be reconnected to the network if they can be found:
Just wondering if anyone has seen any of these probes - either still connected to the network and firewalled off so they can't get out - or powered off and still serviceable? I recently contacted people I'd distributed probes to and managed to get a handful recovered or reconnected and back in operation.