I think donating money is not always the best way to help open source projects. Most of the time they need developer time and general public attention more than money (yes I know you can buy them).

BUT, if I where to donate money, I would definitely go to PyPy progress to support Python 3, they have made an incredibly amazing (and huge) work to improve the performance of the Python interpreter (while the official CPython is already damn fast), and unlike some other projects they have clearly stated and planned how they would use the money to progress.
posted by [Old Forum eet-fuk] • 7 years and 13 days ago Link

Most of them use the cash to pay hosting, personal bills or put bounties on bugs/feature requests. It is a way of giving back after we have taken so much and allows them to hack full-time or more than they normally would have out of the goodness of their hearts. It actually helps a lot.
posted by [Old Forum guest] • 7 years and 12 days ago Link