Ask HN: What can I build that you'd pay for?

I've been in a bit of a slump recently after I lost all my money in my last venture and I've been trying to brainstorm ways of coming back. Seeing as my passion is building projects and I can't outcompete freelancers on price, I figured I'd ask the community if I could build you something for free that you'd pay for if you liked it.

What product can I develop that you or your business/company would be interested in paying for? Additionally, how much do you see yourself or your company paying for it?