NLNet funds some of the most interesting and diverse projects, including some ideas that have massive potential like Femtostar [1] which is an open version of Starlink, and Precursor [2] which is device which now physically exists and is arguably the most secure personal computer ever designed in modern times.
I browse through their projects all the time when I’m looking for interesting, cutting edge work.
[1] https://nlnet.nl/project/FemtoStar/
[2] betrusted.io