A truly 3x3 monochrome font which covers all of standard ASCII with unique glyphs. This is the smallest monochrome font possible, since 2x3 or smaller doesn't have enough bits to represent the 95 printable characters. I've seen lots of 3x3 fonts, but all of them lack uniqueness or use descenders which extend the glyphs past three pixels in height.
The uniqueness constraint means some of the glyphs are rather awkward, especially symbols ($), numbers (2, 5), and lowercase letters (k, g, x). Also, due to the lack of descenders + uniqueness, some lowercase letters that don't have ascenders are three pixels high (c, g, p, q, y). Maybe it could be useful for a coding environment or a shell, where characters must be distinguishable (monospace might look strange, though).
A secondary variant of Σ exists as the previous (reserved) Unicode codepoint.
Characters (reading order in the preview): ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.,"'?!@_*#$%&()+=/:;<=>[\]^`~ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩαβγδεζηθικλμνξοπρςστυφχψω
Glyphs
This font will not be useful to you, I almost certain of that. I created it for my own project.
I was looking for a tiny ~7pts pixelated font that is simple, sans-serif, legible and supports Cyrillic (Russian) letters, as well as a few other select symbols. I failed to find a suitable font neither among the preinstalled, nor online, so made my own.
I know for a fact this font is more compact than Franklin Gothic Medium w/o aliasing at 7px. Looks cleaner, too.
V1.1: Changed "6" a little so it wouldn't like "б", Russian lowercase letter for "B". Also fixed Latin lowercase "h" and "f".
V.1.2: Changed "Ч" and "ч" to be smoother. Were too blocky for whatever I do.