Update: I just found out that this font is called Grand9k Pixel. Other people already recreated that font on here so this will be different: it will have custom glyphs.
The "Pixel" font from the Scratch program at scratch.mit.edu. I might not have found every glyph from the original, so please tell me if I missed one. Maybe I will add custom glyphs.
A port of Jayvee Enaguas's Grand9K Pixel, featured in the Minecraft texture pack "Grand9KCraft". This was easy to do since it was a pixel font.
There's a chance that you've might also seen this in the Scratch programming language under just "Pixel".
Grand9K Pixel is owned by Jayvee Enaguas/Grand Chaos Productions.
This is the font used in my Scratch projects that use SSEGA OS, SSEGA OS 92, and SSEGA OS CD (https://scratch.mit.edu/projects/938150503/ https://scratch.mit.edu/projects/938615942/ https://scratch.mit.edu/projects/939136020/). It has a lot of characters in a 4x5 bounding box.