I added 100-something fonts out of the Playdate Arcade Fonts archive. Alas, most don't have many other characters than letters and digits, on the other hand few are as old as late 1970s.

8000 fonts

Now every initial letter (or digit) has at least 100 fonts.

I filled some external links (over 13k of them total now). I've pushed the number of fonts without any external links under 1,300, still a long way to go.
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Also, in the home page I added how many fonts were added in last 7 days. Hopefully, this will have me motivated to add more when I see zero there.

7500 fonts

I added the 'year' tag/parameter and filled in some values for fonts published in known years. Feel free to filter by year now. Also, if you know a year of creation of some fonts, don't hesitate to suggest it.

Yep, it'll be a big listbox with Char1, Char2, and the Kern value. With some buttons to add/remove rows. Only need to find the time...

Joe Strout: Nice job! Looks promising.
The kerning feature wouldn't be that hard to add, would it? - input box for two characters, perhaps a convenient keyboard shortcut for expanding and contracting the shift, maybe some visualisation of the distance...
Once it's done I'd be happy to add the link among the tools into the ?page=support section.

Here's a screen shot of my conversion tool so far. Still need to add kern support (it currently can calculating kerning, but gives you no way to edit it).

https://imgur.com/a/ASeecF7

@admin: sorry for the late reply... conversion from TTF is still important to me. BMF is the only font support in Mini Micro, and people sometimes want to just draw nice readable text, using Noto Sans or whatever.

I'll see about cleaning up my converter tool and releasing it somewhere, and I guess I'll go ahead and include conversion to/from this AngelCode BMFont format too. I'll be sure to let you know when it's posted (but it may be a while -- got too many irons in the fire right now!).