MovLib

In a Nutshell, MovLib...

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  has had 3,067 commits made by 4 contributors
  representing 38,728 lines of code
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  is mostly written in PHP
  with a very well-commented source code
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  has a young, but established codebase
  maintained by nobody
  with stable Y-O-Y commits
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  took an estimated 10 years of effort (COCOMO model)
  starting with its first commit in April, 2013
  ending with its most recent commit about 10 years ago