Via this rant, I learned about this report, which shows who contributes the most to the Gnome project. I knew that Red Hat was doing a lot of Gnome, but I never knew how much it actually was.
Red Hat are the biggest contributor to the GNOME project and its core dependencies. Red Hat employees have made almost 17% of all commits we measured, and 11 of the top 20 GNOME committers of all time are current or past Red Hat employees. Novell and Collabora are also on the podium.
Way to go, Red Hat!