“Wakamai Fondue”, by @PixelAmbacht, is so wonderfully useful, elegant, and ridonculously easy to use. Drag a font into the browser, and see what your font can do: http://hflr.co/934np
A very nice presentation of Stylistic Sets, as a reminder of which characters get transformed (here’s Requiem):
Ditto a reminder of which characters are substituted by standard OpenType transformations like “Stylistic Alternates” (here’s Obsidian):
And finally a randomly generated sample of possible glyph combinations, to reveal the missing kerning pairs that will keep me up at night (and @JordanTBell, because this is Inkwell Script):
Seriously, thank you for building this and sharing it, Roel! It's a really nice piece of work.