What software do you wish existed?
it could be website/app/extension/anything, but it must be something that even general people could use, it must not be some tool to build software, etc. Tell me something that every normal guy could use!
A character device load balancer that can do random or round-robin so I can replace /dev/random and /dev/urandom with a load balanced character device that feeds random numbers of bits from random random number generators in random amounts mostly as a matter of cargo-culting and so that encryption programs have no idea where their entropy is coming from. This can be done in the application but that is what I want to avoid. I am certain this will never exist as I am very likely the only person on earth that wants this.
Browser extension that allows you to add notes/comments to any webpage. All users of the extension can read each other's notes.
For example, you read an article in your area of expertise and add some info that the author left out or got wrong.
truly speaking, I wished a marketplace similar to uber existed wherein one can learn to drive from uber drivers itself, and they charge as per distance/time!
till now I didn't find any startup focusing on driving license and driving school.
I myself had called a driver from Just Dial!
Take any existing software, and remove whatever part of it that benefits the owner of the software at the expense of the user.