Have you read http://wingolog.org/archives/2013/01/07/an-opinionated-guide-to-scheme-implementations http://wingolog.org/archives/2013/01/07/an-opinionated-guid

Have you read http://wingolog.org/archives/2013/01/07/an-opinionated-guide-to-scheme-implementations http://wingolog.org/archives/2013/01/07/an-opinionated-guide... ? It might help you weigh your options and make a pick that best suits your preferences. I don't think you could go wrong with Guile or Chicken. I use Guile pretty much exclusively and it has a good POSIX API, so I write scripts in Scheme instead of Bash or Perl or whatever.