Perhaps after giving each open source project 11 cents? That made me curious about the numbers, and I found a paper which says "Daffara estimates that there were 18,000 active open source projects in September 2007 worldwide"[0] which would mean donating about $2000.
Another analysis from 2013 calculated that "87% of projects have 5 or fewer committers per year"[1] so if we unreasonably assume that each developer only works on one project, that might mean 5 times as many developers as projects, so $10,000 to donate 11 cents to every open source developer.
