Well, I hope this will fit your needs! Right now it's in beta. Still need to write up documentation and I'm still doing internal testing... but that also means I'm a bit more open to feature requests. You can adjust kerning either in line or using a pre-built style. It would probably be annoying to do it like... for a font, though. Might be best to use a sprite font if the whole font needs to adjust for specific characters. You get a bit more control that way. In fact, if you use a sprite font and then over tune the kerning on all characters except for the ones that have issues, you may be able to use this to adjust kerning wherever you are using this font in a single style.