MineStat
MineStat is a Minecraft server status checker.
JavaScript example
var ms = require('minestat');
ms.init('minecraft.frag.land', 25565, function(result)
{
console.log("Minecraft server status of " + ms.address + " on port " + ms.port + ":");
if(ms.online)
{
console.log("Server is online running version " + ms.version + " with " + ms.current_players + " out of " + ms.max_players + " players.");
console.log("Message of the day: " + ms.motd);
console.log("Latency: " + ms.latency + "ms");
}
else
{
console.log("Server is offline!");
}
});