Are there any popular open source projects written in C++? [closed]

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I've read the source code of a few popular open source projects like apache, nginx...

All of them are written in C, is there one written in C++?

It should be run-able program, not framework...

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KDE

and up, to 30 characters and beyond.

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Mozilla Firefox is written (mainly) in C++.

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You may want to check out this list : http://www2.research.att.com/~bs/applications.html