I've begun using the tag "Constant Height" for fonts wherein most/all glyphs are the same height or occupy the same grid space. This property makes these fonts especially useful for certain PC terminals, physical displays, text editors, logo/design uses, and the like.

By my present definition, the Constant Height category includes fonts which use intentional techniques to introduce vertical spacing between lines (such as letting the comma or underscore descend below the line). But it does not include fonts wherein many letters have descenders that go below the line. This refers to letters like g, j, p, q, y, and ç.

Readers, if any of your fonts are Constant Height, using this tag may help your fonts find their way to the eyes of interested people. I welcome any thoughts others may have on this sort of categorization.

Cheers.

I have also set up a "100% Constant Height" tag. This is for fonts in which every glyph is the same height. Since this causes lines to run together in graphics software, there can be an exception. One glyph is allowed to be higher/lower than the others. This glyph is usually noticeably different from the others and is designed not to be used, but just to exist within the font so that it can increase the line spacing.

This should help people find fonts which create neat lines/rows, 2D grids, seamless patterns, etc.