CraftBook

CraftBook is an heavily customizable plugin that adds interactive mechanisms, and mcw:redstone features, and minecart enhancements to multiplayer. It was created in October 2010 by sk89q and requires Bukkit. Downloads, instructions, and more information can be found on its CraftBook wiki page.

Features
For an up-to-date list of features, see: http://wiki.sk89q.com/wiki/CraftBook/Usage

Links

 * Forum thread
 * Official wiki
 * GitHub repository