The .schematic file format was created by users to store sections of a Minecraft world for use with third-party programs (specifically, MCEdit, Minecraft Song Planner, Redstone Simulator, and WorldEdit). Schematics are in NBT format and are loosely based on the Indev level format.
Download cool stuff created by other to add to your world, replicate your own creations anywhere you like, or share your own creations with others.