This sounds dumb as all heck but a Fediverse equivalent of LinkedIn. Not some corporate hellscape, but something geared towards semi-pro or hobbyists who are looking for collaborative projects. It would serve as a portfolio and a way to group up and network.

So for example, you’re a YouTuber who is looking for an editor. Its not career pay but its a paid side gig. Or maybe you’re an audio guy and are looking to get into the film industry, and want to see if there are local indie films looking for your skills.

There are ‘services’ for these but they’re either adapted from something else (like Reddit or Facebook) or they have some aggressive middleman monetization. And many basically require you to host your portfolio elsewhere, which is sometimes funky to run your own hosting.

A torrent swarm of all the government and court documents that parasites like Lexus Nexus paywall. There is no excuse to not have access to government info online and free. If I understand correctly, some states even have the state statutes (aka laws) hidden behind such paywalls.

Room temp superconductors, would be amazing for maglev trains and the electric grid

Basically a material that doesn’t have electrical resistance and has some funky magnetic properties but works at normal temperatures

Neighbourhood tool cooperative. Some tools I use once or twice a year. It would be nice if a garage in the neighbourhood would have them to borrow.

Dead-easy, beautiful web apps so groups can quickly and easily vote using Ranked-Choice Voting or Majority Judgement (with or without uncertainty). Something FLOSS with reproducible builds, to build trust in the software.

Automated systems (could be an app 🤷‍♂️) to go from a textbook, a YouTube video, or a web course to a comprehensive set of spaced and interleaved quizzes and flashcards.