RejexLib
http://www.brics.dk/automaton/index.html
http://code.google.com/p/automataprojectexam/
http://www.cs.duke.edu/csed/java/biojava-1.4/
http://www.javaworld.com/article/2077757/core-java/optimizing-regular-expressions-in-java.html
http://www.oschina.net/project/tag/298/regex-tools?lang=19&os=36&sort=view