VSL is a very small Lisp system in
trunk/vsl. Its key attribute is that it is small.
The source file
vsl.c is around 3000 lines long, but despite that
the system can build and run much of Reduce. Since there is only
an interpreter it will be slow, but for teaching purposes and for
fun it may still be of interest.
It is especially
intended for use of the Raspberry Pi board, but should build on almost any computer with a modern C compiler.