Gerbil is a meta-dialect of Scheme with post-modern features:
It is written in itself.
It is an Actor Language:
Concurrent and Distributed to the core.
It is an Objective Language:
It sports an integrated MetaObject Protocol.
It is a Systems Language:
Tiny Microkernel; check.
Optimizing Native Compiler; check.
C-Friendly ABI; check.
It is a Modern Scheme Implementation:
It supports current R*RS standards and common SRFIs.
It has a Multiresolution Macro System;
The Macro is the Compiler.
It fully exposes itself to the programmer;
Compiler level operators are available to user programs.
It has an integrated FFI.
It speaks with a LISP.