Turi

Turi is a simple, useless programming language with one-symbol commands, mostly based on messing around with program flow. It's definitely Turing-complete, due to the t command. The language is designed to be as frustratingly annoying to implement as possible.

There are two accumulators: one accumulates floating-point quaternions and the other Unicode strings. The numeric accumulator is initialized with 0 and the string accumulator with the empty string. The numeric accumulator is "A" for short and the string accumulator "S". [String] in the table below is a placeholder for any arbitrary string. You can guess what [Digit] is.

At the end of a source file, execution direction is reversed, as if "zI" was used.

TuriExtended
TuriExtended is an extension to the Turi language containing useful primitives for solving previously unsolvable computing and mathematics problems.

Example Programs
almost-cat: []R< >P[]

Break the universe: ⛁r→r→r→rψ ⛁r→r→r→rψ ⛁r→r→r→rψ ⛁r→r→r→rψ

Fork bomb: Y

F# interpreter: [@fsibot ]R#96n⛁

octopus cat: YR< >P[]ψ