Kilo Lisp

The code should compile with any C89 (K&R2/ANSI/ISO) C compiler. It even compiles with Turbo C 2.0 or SubC. It does not use any stdio functions and compiles to a static executable of 29K bytes using SubC, 13K bytes using Turbo C, and 512K bytes using GCC (LOL).

Source: t3x.org