Not a single fundraising site, but a collection of community resources for protestors around the US.
Arranged by George Floyd's brother, Philonise Floyd.
Arranged by George Floyd's sister, Bridgett Floyd.
After overwhelming support, the Minnesota Freedom Fund is currently asking for people to donate to other organizations at this time. Including on this list for completeness.
This list is by no means complete. Please reach out through Twitter with more links and I will add them to this page as soon as possible.