Braktif

Braktif is a 28-state cellular automaton, defined in ALPACA by Chris Pressey in 2005, which simulates the action of a language very similar to both Smallfuck (in terms of instruction set) and Archway (in terms of program structure). It was ostensibly designed as yet another test of the wire-crossing problem, but it is far more likely it was just done for entertainment.

Example program
The Smallfuck program

*[>>*[*]*]

corresponds to the Braktif program

*                       <<*[--]* 000000000000000000  *[-  --] -d-i--

The above program demonstrates some of the features of Braktif. The symbols  represent instructions, in the manner of Smallfuck. The  represents the instruction pointer, which reacts to the instructions. The  represents the the data pointer and the series of  's represents the data store (which may be considered extending infinitely to the left.) The series of  's represent a bus along which the data pointer and the instruction pointer communicate by sending each other messages. The code must be structured a certain way, with each nested while loop "one level up" from the loop that contains it, in the manner of Archway.