This font is based on the TwentyFourNinetyOne [2491] font, by Steve Mehallo.
(The font listed on typekit.com).
The difference between this and the original version is that this is a pixel font, with no diagonal lines, like the slash (/) and backslash (\) of the original font, and also the Ø and ø characters.
My version has some half pixels, but it would be a true pixel font at a double size.

• The plus-minus sign (±) and the division sign (÷) now actually looks like those signs.
• The inverted question mark (¿) was mirrored in the original font, and I've corrected it in my font.
• The sharp S (ß) now looks more like a ß and not just simply two S-es.
• The characters with grave accent (`), acute accent (´), and tilde (~) has been redesigned.

(Btw, I'm not satisfied with my redesigned Ø and ø :P. I might change those later).