ThinLisp
ThinLisp is a Common Lisp implementation that translates a subset of Common Lisp to very efficient C code.

Note: ThinLisp is not actively developed. ECL is an active and supported Common Lisp to C compiler.

CLiCC is a similar system.

Authors: Jim Allard and Ben Hyde

Thinlisp is meant to allow deployment of Common Lisp applications as efficient C-compiled code, and thus includes notable restrictions as compared to full Common Lisp semantics. Most notably, Thinlisp does not have a garbage collector.

Thinlisp is licensed under an Apache 1.0 style license. The Apache 1.0 license is incompatible with the GPL.

The most up-to-date version of Thinlisp is available from https://gitlab.common-lisp.net/vsedach/Thinlisp-1.1.git. This version contains patches by Vladimir Sedach that fix build problems on SBCL and CLISP.

The original Thinlisp project page can still be found on SourceForge at: http://sourceforge.net/projects/thinlisp/

Tip: If the executables generated by ThinLisp are too large, try using strip. This shrinks the lecho demo binary from 555,893 to 119,020 bytes on a Red Hat Linux 6.2 system. If you compile it with make opt to use the C optimizer and then strip it, then the lecho binary size drops to 71,340.