This is zfunge interpreter by Zinx Verituse. It supports Befunge-93, Unefunge-98, Befunge-98 and Trefunge-98.
First commit is the contents of zfunge-0.0.2pre3+SOCK.tar.gz (dead link) (56,458 bytes).
Fixed compilation errors on modern gcc.
Build and install:
git clone https://github.com/stasoid/zfunge
cd zfunge/zfunge-0.0.2pre3+SOCK
./configure
make
sudo make install
Installation is required for fingerprints to work correctly. More info here.