Bukkit

This plugin logs various player activities such as chat, log-ins, log-outs, etc.

SQLApply-Guests have a unique code to become player.

CommandWatcher-See players commands as they are done realtime.

VisitCounter-Counts Unique Players and a total of all Players

CapsControl - If chat has a configured percent of caps it replaces the whole sentence with lower case, also works with commands.

AdvIpLog - An Advanced Ip Address logging plugin with advanced command lookup commands and works with auth plugins.

McServerStats-Cool Fun facts about your server.

MobGod Give specific mobs Godmode such as Villagers.

Logs a players enchantments to a file.