Hi there, great article and resource. I've added many of these to try in my monospaced font rotation.
In reading about the "Anonymous" font, I found an interesting explanation for the "somewhat strange slashed zero that is slashed from left to right, instead of right to left," and I thought I would share it with you and your readers.
In the page for the newer "Anonymous Pro", the designer explains his choice for the slash direction, in keeping with the original Anonymous designers:
In the earlier fonts, the slashed zero, designed to look different than the capital “O”, goes the “wrong” way compared to most fonts that have this feature. Susan and David did this intentionally to distinguish it from the slashed capital “Ø” used in some languages. Some people thought this looked odd, so I put it the “right” way, and distinguish it from the “Ø” by keeping the slash inside the character.