*Simpleban - This is the most powerful and effective banning plugins directed at Offline-mode servers, but is great for them all.
*Version - 2.1
*Requires: Permissions 2x / 3x or GroupManager with FakePermissions

Features:

Ban a player's ip, From their name.
Keeps a BannedIP list, Which you can check at any time.
Ban a player, and all accounts on that same ip.
Permissions 2x and !new! 3x Support.
GroupManager Support
When you ban a player's ip, It will stop them from coming back on a new Port.
Ban an offline player
Unban ip's and Player's in game, (Check the List!)
If a player's ip is banned, and he logs on with a new one (same in game name) his new ip will be banned automatically!

Commands and Permissions:

commands:
  simpleban:
    description: Ban player name and IP. (It has player name matching)
    usage: /<command> <playerName>
    permission: simpleban.sban
  banlist:
    description: Ban a player which is not online using IP history.
    usage: /<command> <playerName>
    permission: simpleban.sbanhistory
  ipban:
    description: Ban an specific IP.
    usage: /<command> <ip>
    permission: simpleban.sbanip
  ipbanname:
    description: Ban an specific IP using a player name.
    usage: /<command> <playerName>
    permission: simpleban.sbanipfromname
  simpleunban:
    description: Unban the player with given name.
    usage: /<command> <playerName>
    permission: simpleban.sunban
  ipunban:
    description: Remove all matching IPs from ban list.
    usage: /<command> <ip>
    permission: simpleban.sunbanip
  simplereload:
    description: Reload bans file.
    usage: /<command>
    permission: simpleban.sreload

Installation:

Put SimpleBan.jar Into Plugins Directory
Success!

SimpleBan