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Generic Code-Seeking Diassembler with Fuzzy-Function Analyzer
...The original purpose of the Fuzzy Function Analyzer was to assist in code recovery where the sourcecode for the current binaries got lost, yet the sourcecode for an old binary was retained. The Fuzzy Function Analyzer allows you to match up known functions between the two binaries so you can concentrate on disassembling and reverse engineering the parts that are different and recover the code for the current binary that got lost.