2

is there a list of plugins that are in use on WordPress.com somewhere?

It would be very interesting to see how they have implemented specific widgets and functionality.

4

Not an easy question to answer. That stuff is mostly private and they seem to use greatly modified versions of some public plugins.

wordpresscom tag in repository has several.

Also see this topic for more ideas and places to check List of plugins used on WordPress.com

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  • Thanks, but your answer was a bit disappointing since I thought they might publish their code according to the GPL? – grm Sep 13 '10 at 19:11
  • As long as they don't redistribute code and purely use it for wordpress.com there is no obligation under GPL to share it. Some stuff gets released, some doesn't. – Rarst Sep 14 '10 at 3:15

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