BanManager is the Java based plugin for Bukkit and is released under the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales
BanManagement is the web interface which accompanies BanManager and is released under the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales but with additional terms. A hyperlink to www.frostcast.net must be clearly visible on every page.
BukkitDev - http://dev.bukkit.org/server-mods/ban-management/