clac (Command Line Advanced Calculator) evaluates mathematical expressions input via command line arguments or from stdin and writes the results to stdout. Unlike other command line calculators, clac has infix (natural order) expression syntax, is quite comfortable with complex numbers, defines a great many functions and constants by default, and allows easy definition of new user functions and constants using Python.
pyPEG is a quick and easy solution for creating a parser in Python programs. pyPEG uses a PEG language in Python data structures to parse, so it can be used dynamically to parse nearly every context free language. The output is a plain Python data structure called pyAST, or, as an alternative, XML.
X# (pronounced X-sharp) is an XML-oriented programming language designed to quickly create Web applications and services. Everything is represented as an XML tree, and instead of using functions to manipulate information or perform actions, all possible operations are done by adding, removing, or changing nodes from this tree. Since there are no functions to learn and everything is done intuitively, even inexperienced developers can create complex Web applications and services quickly.
interp is a powerful programming language, a testing platform, and a development framework. It is targeted for Linux/Unix-based systems, yet remains adaptable to less powerful embedded systems that were never intended to host an interactive programming language, because all you need is a serial port. I2 is a compiler for interp.
Thyrd is an experimental, reflective, visual programming language and environment. In Thyrd, both data and code are stored in cells situated in nested two-dimensional grids. All operations the user can perform to edit the structure are implemented as operators in the Thyrd language, thus a Thyrd program can inspect and modify itself or other programs in the same space. Thyrd belongs to the Forth family of languages. It most resembles Joy in that it uses quotation and combinators to implement iteration and recursion.
Monster script (or just Monster) is an advanced scripting language made specifically for game development. The language features many new and powerful features, while still aiming first and foremost at increasing productivity and actual usability. The language is especially designed to facilitate game modding and user-generated content and scripts. It is highly object oriented, type safe, bytecode-compiled, and is easily embedded into existing game engines.