Clone Digger is the tool for finding software clones (duplicate code) in programs. Currently Python language is supported, Java support will be added later. The following definition of clone is used: two sequences of statements form clone if one of it can be obtained from the other by replacing some subtrees of its abstract syntax tree by other subtrees. Found clone candidates are reported to the HTML with a highlighting of differences. This report can be used to form recommendations for refactoring.

http://clonedigger.sourceforge.net

Could be used to replace symilar ?