Major Open Source Projects: How much money do they actually make?

Comparing the revenue of some of the biggest names in Free & Open Source Software.

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Here's a seemingly simple question: Which Open Source projects and foundations bring in the most money?  And, as a follow on to that... which bring in the least?

GNOME?  KDE?  Mozilla?  Apache?  The Free Software Foundation?

There are a lot of big names in the open source world... but how much money do the most recognizable names in Free and Open Source Software actually earn in yearly revenue?

I wanted to know.  So I collected revenue details for 17 major open source foundations -- by digging through IRS filings, Annual Reports, and every other source of information I could get my hands on.

Then I stuck them in a spreadsheet and made some fancy-shmancy charts.

Some of the results were expected and obvious... others I found truly surprising.  Honestly, some of the results are a gosh darned travesty.