SDL Multiple Windows

Hey guys I don't think this is a duplicate thread because I am combining multiple questions into one...

First: I know it isn't possible in native SDL to have multiple windows. Is there an extension library that supports this?

Second: If not, is there a way to send either a variable or a value to a completely separate executable?

The reason for this is that I want a separate HUD to show the users level, points, and other ect things in my game.
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