A befunge interpreter written in r5rs scheme

(befunge "64+\"!dlroW ,olleH\">:#,_@")

Prints Hello, World!

(befunge "v>>>>>v"
         " 12345"
         " ^?^"
         "> ? ?^"
         " v?v"
         " 6789"
         " >>>> v"
         "^    .<")

Prints an infinite stream of random numbers between 1 and 9

Notes:

• this implementation can accept grids of almost any size, which may break programs that use the fixed grid size
• Rows can have variable sizes but will all be maximized in the grid
• use escape characters for " and \

Links:

• The official Befunge documentation
• Befunge on Esolang

There are slight differences between the specification on Esolang and the official ones. This implemntation uses the specifications described on Esolang.