Titokone is a TTK-91 machine language simulator written in Java. http://www.cs.helsinki.fi/group/titokone/ Titokone is free software (free as in freedom), published under the GNU Lesser General Public License. You are allowed to use, modify and redistribute your modified or unmodified version, provided the license is kept with it and followed. The users' rights are protected by copyright held by the University of Helsinki Computer Science department; the software is not in the public domain. See COPYING for details.