Open Collective: https://opencollective.com/

Donor box: https://donorbox.org/

Liberapay: https://liberapay.com/about/faq#fees

Anedot: https://www.anedot.com/pricing - 4% +30c.

Buy me a coffee: https://www.buymeacoffee.com/ - membership option. 5% transaction fee.

Streamlabs: Louis Rossmann is using it https://streamlabs.com/louisrossmann/tip

ko-fi: Used by db0 piracy lemmy instance https://ko-fi.com/db0