I would like a plugin that allows you to add a variety of configurable behaviors to mobs using Minecraft's core of entity AI. ex. You would have the ability to add an additional creeper property to a pig so then when you make direct contact with one, it will explode. However, due to the ability to implement multiple properties for entities, you would also have the ability to implement a blaze property so then pigs would in addition throw fireballs in your direction if you are in it's line of sight.
For all your four requests, could you PLEASE format them properly? This will help plugin devs (like me) more willing to (a. read into what you've posted, (b. become more willing to work with you since you actually took time to format it. If you don't know where to find the template, here it is: http://forums.bukkit.org/threads/read-me-first-plugin-requests-guide.81209/ Most requests you've made aren't really easy to do, which will make it harder to get someone willing to do it anyways, but at least this will give you a better chance.
MCaeolus I believe that what kirbsrob is asking for in this case can be rather simply explained; he is looking for a plugin that allows you to attach mobs AI to different mobs. I think RemoteEntities was working on this at one point but I'm not sure how that turned out in the end.
