THRAT

THRAT is a Brainfuck-derived esoteric programming language devised by Mate Varga in 2004. It uses two instructions to select from a table of ten operations, in the style of ReMorse.

Like Brainfuck, THRAT has a memory block (4096 bytes by default) and a memory pointer that points to a single byte in the block.

The ten operations are the eight from Brainfuck plus two more:

There is an operation pointer which points to a single operation (initially the first). The ; instruction increments the operation pointer by 1, and the : instruction executes the operation which is currently pointed at.

Computational class
The THRAT commands are a proper superset of Brainfuck's, with no special restriction on the execution of arbitrary commands at arbitrary points; the THRAT specification also does not preclude having an unbounded store (either a block of infinite size, or a block which grows when the bounds are exceeded.) So THRAT is in the same computational class as Brainfuck. Brainfuck is Turing-complete, so THRAT is Turing-complete as well.