Bukkit

This plugin utilises Hidendra's plugin metrics system, which means that the following information is collected and sent to www.mcstats.org:

• A unique identifier
• The server's version of Java
• Whether the server is in offline or online mode
• The plugin's version
• The server's version
• The OS version/name and architecture
• The core count for the CPU
• The number of players online
• The Metrics version
  Opting out of this service can be done by editing plugins/Plugin Metrics/config.yml and changing opt-out to true.