It's a very fast Scheme implementation, compiles to C and has a pretty decent [library ecosystem](http://eggs.call-cc.org/5/ http://eggs.call-cc.org/5/). I've

It's a very fast Scheme implementation, compiles to C and has a pretty decent [library ecosystem](http://eggs.call-cc.org/5/ http://eggs.call-cc.org/5/). I've used it to build service monitoring daemons and various utilities. As of version 5 Chicken supports static compilation and can produce a single-file binary, which makes it super handy for a lot of use-cases.