Does it even exist?

Now, I know what I want, I just don't know if it exists anywhere 😂

I'm looking for some sort of software to run on my laptop linked upto my TV as a second screen. On the TV I want the custom maps I've made to be displayed with a fog off war where I can slowly 'erase' the fog to show where the players can currently see.

Up until now I've been doing it within Photoshop but I'd like something easier/better/prettier.

Thanks 😁