Qscheme is a fast and small implementation of Scheme written in C. QScheme is easy to interface and should be easy to use as an extension language. QScheme currently supports foreign function call and dynamic library. A Perl-like regular expression module is provided as example. QScheme is really fast: benchmarks shows that it is generaly between 2 and 70 times faster than other scheme interpreters. It also features GTK+ bindings, libglade bindings, and native multithread support.