Sorry to be that guy, but... Please consider donating a significant amount to them, given that they have been a cornerstone of your very successful career.
I did something similar in the past, in relation to Ubuntu, and I never regretted it, even if that money would have been very useful if spent in other ways.
I did something similar in the past, in relation to Ubuntu, and I never regretted it, even if that money would have been very useful if spent in other ways.