Here is my fourth attempt to make a narrow font that accentuates diagonals. It seems to be a good programming font at size 10. It makes surprisingly easy to read upper case consonant names.

Design is as follows:

Monospaced of course, because code pretty much requires this.

Wide in the center of each letter so that diagonals and crossbars are easy to see, and narrow toward the top and bottom so that the characters pull away from each other and are easy to tell apart.

Bodies of the lower case letters are made relatively tall so they are easy to read in code, yet maintaining a clear difference between the height of the lower case and upper case characters - very important.

From top to bottom: 2 blocks upper diacritics, 1/3 block space, 2 blocks stems and upper case, 5.3 blocks lower case body, 1/3 block space, 2 blocks lower diacritics.

Small sizes need to be easily readable.

Clearly distinct are the members of each of the following groups of glyphs: ({[  ])}   Il1  aes   Ss56$   Zz217?   `'   .,   uUvV   coCO0D   pP   ;:   ~-  . The ability to tell exacty what each character is, is critical in programming.

Numbers are really large. It doesn't hurt at all for number to stand out in programming. This is ok because numbers never have diacritics. The 7 extends below the line so it does not look like a 2 when underlined.

Vertical alignment - The pairs {}  ()  and []  line up precisely vertically.

The dots are large and distinct so they show up easily in code.

Large numeric 'operators' +-/\%^~=* are easy to read in code.

At least one block touches the right edge in each glyph so that Visual Studio can figure out what's going on.

Also:

Diacritics have lots of space since the area above and below the capitals is more than 2 blocks, so they can be added later on.

Looks scripty - There is a bit of a scripty thing going on because of the wide bases for the lower case i and l, so this is enhanced a bit in the I, J, S, U, Z, f, t, u, z and s.

Narrow enough to be mistaken for an informal text font.

Typeface based on the Love Live! School idol project logo subtitle. This typeface attempts to be more accurate than existing substitutes (OCR, Anvylon, White Rabbit etc.) (even though only like 14 of the characters are restorations).

EDIT 6th May: Added most of Latin-1 Supplement. Some punctuation characters now take as much space as the whitespace character.

Monospaced typeface based on Otonokizaka Std II (https://fontstruct.com/fontstructions/show/1399114/otonokizaka-std-ii), which in turn is based on the Love Live! logo subtitle, with slight changes making some characters more legible at small sizes. Can be used as a high-DPI code editor font.

EDIT 6th May: Added most of Latin-1 Supplement. A boldface version is now also available (https://fontstruct.com/fontstructions/show/1401380/otonokizaka-std-ii-1-3).

fn('hi\n');

A font made for the Pixel Vision 8 console. Ideal for programming, feel free to use it anywhere. 6px monospaced.

An interesting simili of Fixedsys featuring improved space conservation and reworked characters. EDIT as of 10/14/2015: I scrapped the idea and extended the letters though the style remains the same. Standard ASCII only.

A monospace coding font with support for Basic and More Latin, Latin Extended A, Armenian, Georgian, (Hiragana, Katakana (these two are being redrawn)), Bopomofo / Zhuyin, Basic Greek and Cyrillic alphabets. Also supports Box Drawing and some other character sets. Anti-homoglyph (does not or should not contain any two characters that look exactly the same)