A funny game about trading drugs. You can find it here. You can play a similar game with a different atmosphere called taipan. You can play this game with telnet or ssh on sdf.org (and try to be in the hiscores).
For compiling it, I had to install the libglib2.0-dev package and to use the configure script with the following flags:
./configure --disable-gui-client --enable-curses-client --disable-gui-server --enable-glib2 --without-esd --without-sdl