SUBLEQ is a machine language in which there are no opcodes, the only operation available is substract and branch if negative or zero. This project offers a virtual machine for SUBLEQ programs. The included compiler allows you to write SUBLEQ more easy.
Lich is a cross-platform multithreaded interpreter meant exclusively for use with text-based MUDs. The application natively supports the Ruby language as well as the Simutronics "Wizard" script standard including their StormFront expansions.