Unsolved problems in mathematics
Mathematical puzzle
Wolfram's 2-state 3-symbol Turing machine
Duff's device
Ant colony optimization
Lego Technic
Cyclic cellular automaton
Wikipedia:List of really, really, really stupid article ideas that you really, really, really should not create
Wikipedia:Unusual requests
Leck mich im Arsch
Metasyntactic variable
Mirror, Mirror (TV series)