Minecraft Server Player List?

I'm admin on a server, is there a way or preferably an app that I can check the players on our server without logging in?

You could try MineChat, the only prob is when you log on, it does this notification:
[Playername]:connected on [device] using MineChat. So yah

I have used this before.

http://dev.bukkit.org/...bukkitgui/

It's a server client for a bukkit based minecraft server and allows you to see the online players and take control of loads of other parameters without actually logging into minecraft and joining the server yourself.