Ask HN: What experimental app are you working on now?

I spent a few years working on an experimental app called "MeetingGlass - Easy long video meetings through virtual frosted glass" (https://meetingglass.com/). I couldn't help but work on it because I love remote work so much.

I wonder if anyone here is also working on experimental apps that provide new ways to do things that are maybe ahead of their time or maybe still in the proof-of-concept stage...

I'm not talking about demos, prototypes, but relatively complete working products that you can try online.

If you are working on such experimental apps, please share them in the comments.