Bicycle Repair Man
   Open source refactoring browser for Python that automates refactorings. Named after a super-hero in a Monty Python skit.
   http://bicyclerepair.sourceforge.net/

XP Software
   Testing Framework software for many languages, facilitates refactoring. Proper refactoring without good tests is very difficult.
   http://www.xprogramming.com/software.htm

Xrefactory
   Development tool extending Emacs and XEmacs editors by intellisense code completion, source browsing, and refactoring functions. May be the first C and Java refactoring tool.
   http://www.xref-tech.com/speller/