Jumper - yes, the basic code from there, but slightly modified, for depending on the number of players who are infected zombies. I wrote this note and the source of the plugin authors and has indicated a link to the plugin.
Ghost - before it was the Ghost, but of the plug was only rendering method.
Why do you post zombies that already exists?
Another ability to jumper, I thought not: (
but the ability of Ghost works quite differently.