CraftBook

NOTE: ''Door and bridge are fine to use, but for some reason, gates cause a server crash, please do not attempt to use them. .''

CraftBook is one of Minecraft’s first ever game mods, and as a Minecraft SMP addon, it adds: As for details, this plugin is massive, so please refer here for more detailed information on all the features and how to use them.
 * Modular, and extremely light on your server.  Everything is off by default.
 * Enable features that you need, disable ones that you don’t. Even tweak features to your liking.
 * Adds heaps of mechanics that allow you to mimic large portions of FTB/Tekkit with a vanilla client.
 * Redstone ICs (Logic gates, Sensors, Many others!)
 * Elevators for your server so people can jump between floors quickly. (Or smoothly, if you choose so)
 * Working cauldrons so players can cook inside them.
 * Your own custom crafting recipes.
 * Hidden switches for players.
 * Togglable areas and bridges.
 * Chairs you can sit on.
 * Working pipes that can transfer items from place to place.
 * Footprints where your players walk.
 * Mobs and players drop their heads.
 * The ability to bind commands to items, with cool-downs, permissions and timers.