The Kiwi Programming Language is an object oriented script language. The target of this language/system is HyperTalk/HyperCard for UNIX.
Wisp is a small Scheme-like language designed to be easily used in various structured data processing tools. The accent is on simplicity, automatical generatibility, and efficiency. (Currently on long hiatus. Gauche has similar goals and is maturer.)
Wyvern is a console tool to make text adventures. It is programmed in C, and developed for Windows and Unix-like operating systems. Official site currently @: http://www.jonathantoddskinner/wyvern.html
Zoso is a contextual programming language. Contexts speed software development by allowing you to use "mini-languages" that are optimized for specific tasks in a single source code file.
An lightweight open source implementation of the Rexx programming language.
this is a preprocessor to provide a "national lang support" before the compile-time and then save a lot of run-time. it initially intended to process websites to multiply it with the number of human langs but it is simple enough to use more generally