A highly responsive Turing machine simulator with many examples and extensive documentation.
http://stud4.tuwien.ac.at/~e0225855/alana/alana.html
LV Apparently:
$ gtar tfz alana-1.0.tar.gz alana-1.0/ alana-1.0/TODO alana-1.0/README alana-1.0/halting.txt alana-1.0/alana.tcl alana-1.0/examples/ alana-1.0/examples/multiplication.al alana-1.0/examples/a2n.al alana-1.0/examples/unaryadd.al alana-1.0/examples/divisibility.al alana-1.0/examples/copyinput.al alana-1.0/examples/binaryadd.al alana-1.0/examples/subtract.al alana-1.0/examples/primality.al alana-1.0/examples/busy5.al alana-1.0/examples/anbncn.al alana-1.0/ChangeLog alana-1.0/COPYING