Module-Build

In a Nutshell, Module-Build...

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  has had 2,960 commits made by 57 contributors
  representing 14,393 lines of code
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  is mostly written in Perl
  with a very well-commented source code
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  has a well established, mature codebase
  maintained by nobody
  with stable Y-O-Y commits
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  took an estimated 4 years of effort (COCOMO model)
  starting with its first commit in August, 2001
  ending with its most recent commit about 3 years ago