CustomMobs moved to spigot for newer versions! Check out the page here: CustomMobs on spigot
VERSION 4.0 AND NEWER ARE ONLY AVAILABLE ON SPIGOT

Bored of the normal mobs spawning all over the world? Mobs which just have always the same weapon, same health and nothing else? Here's the solution: CustomMobs! Customize your mobs just like you want and save them to a simple file. Once created and saved you can spawn them easily as often you want and where you want. In addition it's easy to spawn mobs with other plugins since the whole spawning process got shortened to one single method!
What is CustomMobs?
With simple words this is a mob-customizer. create mobs just as you like them and spawn them with potion effects, armor or whatever you like. Even the drops of a mob can be customized!
Command-Descriptions and Examples: Click Here...
[Command descriptions for v3.0 and newer]
Installation instructions and patchfiles for your craftbukkit or spigot server are included in the download Zipfile.
Its range can be from 0 to 100 and it defines how often a mob-spawning is controlled by the CustomMobs plugin and a normally spawned mob is replaced by a randomly selected mob of the mobs that are added to the randomly spawning mobs.
Connected to the /crespawn-settings. If a mob is set to respawn at a certain location this mob will spawn there at server startup if this is set to true.
Connected to the /crespawn-settings. If spawnAtStartup is 'true' all mobs that set to respawn at their defined location will spawn not instantly at startup, but <delay> ticks later. (1 second = 20 ticks; Which means by default they will respawn 5 seconds after startup if spawnAtStartup is set to true)
Connected to Spawners. This defines how near a player has to be to a spawner so the spawner actually spawns the mobs specified. Like if you are 17 blocks away, but this is set to 16, the spawner will spawn nothing.
Connected to the /cmob cmd-settings. Commands listed here are banned from being executed when a mob dies. Which means if a mob has been set to shedule the command '/stop' (to stop the server obviously) when being killed, but this list contains this command as banned command, it will not execute. This secures some restrictions so that somebody who has access to the functionality of this plugin only, cannot take over the server. However, if you wish that a mob should be able to execute /stop or /restart when killed for WHATEVER reason, then you just have to remove that command from the list and reload or restart your server. Commands listed here in the config.yml must not start with the leading '/'.
If one of the commands listed here is executed, all mobs with spawnLimit will be killed and the player will recieve a message about how many mobs are killed. Killing mobs with this command does not shedule the respawning. Commands listed here in the config.yml must not start with the leading '/'. Only players with the permission custommobs.* (permissions will change and multiple permissions will be introduced with v3.1) can use this functionality so be sure that all players that have access to /butcher or /killall or whatever command listed here has permissions to use the limit-resetting functionality. Permission needed for usage of spawnlimitResetCommands: custommobs.limit.flush
(Moved to the following Site:)
[Outdated D:]
As dev.bukkit.org doesn't allow the sharing of .rar files, i'll upload v3.0 and newer versions to dropbox.
See the Readme file for instructions on installing the plugin!
v2.51 and older still available on the "files" page
v3.0: CustomMobs_v3.0 (Dropbox.com)
v3.1: CustomMobs_v3.1 (Dropbox.com)
v3.2: CustomMobs_v3.2 (Dropbox.com)
v3.3: CustomMobs_v3.3 (Dropbox.com)
v3.4: CustomMobs_v3.4 (Dropbox.com)
v3.5: CustomMobs_v3.5 (Dropbox.com)
v3.6: CustomMobs_v3.6 (Dropbox.com)
Chinese mirrors:
v3.6: CustomMobs_v3.6 (Chinese Mirror)
v2.6: CustomMobs_2.6 (Chinese Mirror)
Upcoming features are not listed in the "Future Plans" section on the spigot page!