One command block commands! copy these commands for epic contraptions! 
All you have to do is
1. get a command block
2. place the command block down and paste in the command.
3. place a button on the command block
4. press the button
5. DONE!

Furniture Commands:
http://bit.ly/1AyiDdC 
http://bit.ly/1AyiKWC
(Click to copy and paste the command)

City, Villages and Mountains command:
Villages http://bit.ly/1CPcsEo
Cities http://bit.ly/1CPcxrq
Mountains http://bit.ly/1CPcBHV

Weather Command:
http://bit.ly/LDZWeatherOOC

Guns One Command:
 http://pastebin.com/raw.php?i=dESreVGE

Spells Command:
http://pastebin.com/raw.php?i=ieMUzZKM

Trolling Command:
http://bit.ly/1EMTQcv

Weapons Command:
http://pastebin.com/raw.php?i=L4mBTA7Y

Instant Maze:
http://bit.ly/LDZMaze1 

Magic Egg Shrine:
http://bit.ly/LDZDShrine

That all the commands! Anymore one command block commands tell me!
Note: I did not discover any of theese. Most of them were discovered by IJAMinecraft.
I hope you enjoy these commands!