From Gambit wiki
I've read the Scheme reports since R3RS and consider Scheme my native programming language. I look forward to R7RS now. I return to Gambit-C after many years to rewrite a suite of command line tools around SQLite3 in a free programming language. (My previous implementation language is being litigated to death, but I find it a breath of fresh air to be able to use Scheme anyway.) Never used a foreign function interface before.