NGI funded us to work on the GNU Name System (https://www.rfc-editor.org/rfc/rfc9498.html), that includes the Go implementation, updates to the C implementation, and the specification. Plus NGI funds work on https://taler.net/. Another example for a project they funded is https://cryptpad.fr/. https://nlnet.nl/project/ has an extensive list. If you actually care about privacy on the Internet and FLOSS, I'd be surprised if you did not find some project there that you know or use.
If you are working on improving privacy on the Internet with FLOSS, you can still apply for funding at https://nlnet.nl/propose.