sensemote

In a Nutshell, sensemote...

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  has had 18 commits made by 3 contributors
  representing 26,547 lines of code
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  is mostly written in C
  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 7 years of effort (COCOMO model)
  starting with its first commit in March, 2012
  ending with its most recent commit almost 10 years ago