R. Alexander Milowski wrote the original Kawa, as an interpreter.
Per Bothner re-wrote Kawa as a compiler, and the current Kawa has
probably none of Milowski's code left - only the name remains.
Other people have contributed small amounts - see ChangeLog entries.

Have looked thorough gnu.bytecode, gnu.math ChangeLogs - TO-DO OTHER PACKAGES.

Geoff Berry  <gcb@duke.edu>: Handle Exceptions attribute.  Other improvements.
Daniel Bonniot  <bonniot@users.sourceforge.net>:  Various small fixes
  and additions to to gnu.bytecode.
Marc Feeley: srfi-0 (cond-expand macro)
Lars T Hansen: srfi-11 (let-values, let*-values macros)
Thomas Kirk  <tk@research.att.com>  ZipLoader improvements
Brian R. Lewis <brlewis@users.sourceforge.net>:  ArrayClassLoader, ZipLoader
  improvements.
Al Petrofsky <albatros@wco.com>: Improve gnu.math printing.
  New IntNum methods.
Ola Rinta-Koski  <ola@cyberell.com>:  ValueStack bug-fix.
Olin Shivers:  SRFI-1 list-processing library.
John David Stone: srfi-8 (receive macro)
Marco Vezzoli <marco.vezzoli@st.com>:  SRFI-1 tailoring for Kawa.