I’ve noticed that one of the more popular, albeit old and poorly written, articles on here is the Free Fully Customizable Twitch Stream Overlay Template. If you are unfamiliar with gIMP, Adobe Photoshop, or others you might find that one a bit overwhelming and confusing.
So:
I’ve opted to use the template to provide some templates for those who would rather have a simple, generic, accessible, and fun overlay right out of the box.
I’ve made three, but I intend to knock out a few more whenever I get bored or have the chance or feel like people would find it useful.
In order, they’ll be one with an SNES theme, NES theme, and an Atari theme!

SNES Retro Twitch Stream Overlay
This one is simple and designed, like the other retro overlays, with a 4:3 aspect ratio in mind. Similar to if you were playing on an old-fashioned CRT TV.
If you tell your emulator to display “square pixels”, well, it’s not going to show right and I would recommend putting a solid black background behind the emulator video source and the overlay image source.
There’s an argument to be made about using square pixels, but it’s wrong.

NES Retro Twitch Stream Overlay
This one is sure to appeal to most retro streamers and features a very pretty NES controller stock photo.

Atari Retro Twitch Stream Overlay
This one is great if you do actually intend to stream all your Atari 7800 collection but also is nice as a generic dark retro twitch stream overlay.

Wrapping up!
I hope these free retro Twitch stream overlay will be of use to everyone, if you’d more be sure to keep up with the page or comment below. If you’re interested in more stream tips and advice, be sure to check out the How to Stream on Twitch and Succeed series or sign up for the How to Stream newsletter!
There is this project, which is used for RetroArch, that downloads “bezels” or banners by the sides of 4:3 games, it could be used as inspiration
https://github.com/thebezelproject/BezelProject/blob/master/README.md
That’s real neat and I’m skimming through their repos now to look at them all. They have a sort of faux-tv-screen kinda overlay which looks similar to one I made awhile ago (except mine was just an old-ass tv with a transparent glass/glare thing going on). You can check it out here: https://floydasaur.us/vintage-overlay/