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Re:One in every 600 websites has .git exposed by juliangregorian on Monday July 27, 2015 @12:24PM (#9956132)
Drupal, MediaWiki, Laravel, Slim, it's a pretty long list, and it includes projects that target Serious Devlopers.
Re:One in every 600 websites has .git exposed by vog on Monday July 27, 2015 @12:35PM (#9956224)
Also, this is really PHP specific.

Look at any larger Python (Django/Flask/...) or Ruby (Rails/...) project, and you will always find a proper "public" directory, although it may be named differently.

Not sure about Perl though ...