Before you say "oh no, another lisp",
consider the following:
femtolisp is about 150kb,
is very self-contained,
and has the following features:
* vectors, strings, gensyms
* backquote
* exceptions
* printing and reading circular/shared structure
* all values can be printed readably
* prettyprinting
* hash tables
* support for directly using C data types ala Python's ctypes
* equal and ordered comparison predicates that work on circular structure
* proper tail recursion
* io and memory streams with utf8 support
* highly compatible with Scheme, including some R6RS features
* simple, well-organized, powerful API with as few functions as possible
* compacting GC
* and...
...it is fast, ranking among the fastest non-native-compiled Scheme implementations.
