pliant

[Brian Rice]

Pliant is a dynamic programming language framework built from a very tiny
language with a simple syntax.  All changes to the language are made through
extension via modules.  Its modules are extensible enough to allow dynamic
addition of features that are inseperable in other languages.  Pliant is
based on expressions, and so is procedural and lacks garbage collection.
However, it can reflect on its language structure for dynamic compilation
and extension.  Pliant is freely available (http://pliant.cams.echess.fr)
under the GNU GPL v2 for the major operating systems on the Intel386
architecture, including linux.