elastiC is a portable, high-level, object-oriented, interpreted language with a C-like syntax. It features dynamic typing, very fast Garbage Collection, lexically scoped closures, namespaces, and a rich set of fundamental types. It is extensible through an easy and robust API. Its very light footprint also makes it ideal in embedded systems.
Jind is an interpreter for a toy programming language. The aim of the game is to lead a person out of a labyrinth by giving appropriate textual instructions. The challenge is to find a general solution by using conditions and loops. Jind can be used to teach the basics of programming in an understandable, entertaining, and instructive way.
Gauche is an R5RS Scheme implementation that aims to be a handy tool for daily work. Quick startup, a built-in system interface, and native multilingual support are some of its goals. It has an OO system similar to STklos and Guile. It supports UTF-8, EUC-JP, and Shift-JIS multibyte encodings natively.
Ch is an embeddable C/C++ interpreter for cross-platform scripting, shell programming, 2D/3D plotting, numerical computing, and embedded scripting. It is the simplest solution to numerical computing and visualization in the domain of C/C++. It supports the ISO 1990 C Standard (C90), major features in C99 (complex numbers, variable length arrays or VLAs, type generic functions, long long data type, etc), classes in C++, and extensions to the C language like nested functions, string types, etc. It can be embedded in other applications and hardware and used as a scripting language. C/C++ code is interpreted directly with no compilation to intermediate code. It supports Linux, Windows, MacOS X, Solaris, HP-UX, and FreeBSD.
UnderC was designed as a compact fast interpreter which does most of the ISO standard. It does templates, and comes with 'pocket' versions of the standard library classes like string, vector, map, etc. It is very straightforward to load functions from shared libraries using a simple pragma and an external "C" directive. UnderC is a fully interactive system, so single lines of code can be quickly evaluated and tested.