Pogic This is a Minecraft client/server mod that will allow SMP servers tell clients to download and run mods. Using this you can add new creatures to your SMP server, and that's just the tip of the iceberg. The client side mods are run in a Java sandbox keeping your computer safe from evil servers out there. There is a limited API that the client mods can make use of, but that API will grow. Prerelease Demo Video: A Baby Creeper Sorry about the sound. Release Status THIS MOD IS NOT READY FOR GENERAL USE That said, if you are a developer, and know how to use git, eclipse, mvn, ant, patch, and the Minecraft Coder Pack you can try this out on your own computer. There are hard coded assumptions that you the server is on "localhost" and that port 8081 is safe to use for the mini http server. More at the Pogic Github site Also see my TODO How to Help I'm going to be less available the next few days. Please be patient. If you are a developer, you might want to take a swing at some of the TODO items. If you are a modeler you might want to take a swing at creating a new mob that would show this off a lot better than my Baby Creeper. If you are a Java security guru, you might want to audit my code and let me know what the risks are with the current sandbox. Bukkit Team: I had to make some modifications to CraftBukkit to get this to work. I'd love to see this merged back in. What can we do? Minecraft Single Player Modders: I'd love to help you turn your mod into a SMP Pogic mod.