プロトタイプベース・オブジェクト指向とは
http://sumim.no-ip.com:8080/wiki/493

Google Directory Prototype-based
http://directory.google.com/Top/Computers/Programming/Languages/Object-Oriented/Prototype-based/

Self
http://research.sun.com/research/self/

Cecil
http://www.cs.washington.edu/research/projects/cecil/www/index.html
http://www.kmonos.net/alang/etc/cecil.php

Cel
http://www.redwoodsoft.com/cel/

Io
http://www.iolanguage.com/

soopy
http://soopy.sourceforge.jp/tutorial/soopyindex.html