Netrek is a fun multiplayer network game to play, but multiplayer games are only fun with multiple players!
With this app you are one click away from finding out if there are other people playing. Just fire up the "Who Plays Netrek" and you will be given a list of active servers and their status.
Note that you can not actually play netrek with this app. For this you need a full network client (see www.playnetrek.org for that) but at least you will not fire up your client in disappointment, because you now know:
"Who Plays Netrek"