May sound boring and small but it is a burning problem I'm solving today, we're adding SSO or single sign-on to Tesults (https://www.tesults.com) - long overdue and requested at this point by many teams. Hope to have it done by next week.

Not as grandiose and admirable as Space X and Neural Link but in a small way we do make the world a better place, we even have a promise, giving open source developers, small teams getting started, individuals and educators free SaaS to handle something that would otherwise be pain to do on their own anywhere near as well.