We develop 2 artful digital font-families called “Linux Libertine” (serif font) and “Biolinum” (sans-serif). Both elegant good-readable Unicode fonts for daily & professional use (see OpenType & WOFF). Break the monotony of (c) W*ndows Fonts!
I found some Microsoft Windows fonts such as Arial, Cambria, Segoe UI, Times New Roman can support contour tones (see official website of the International Phonetic Association) very well, which need each several tone bars to combine as ligature. But Linux Libertine cannot. Please add this feature.