My first [(not that) serious] attempt about pixel font :)

But it's not that general purpose - its design and charset are both specialized for Hanyu Pinyin, the standard romanization system of Chinese, with tone marks signified.

āēīōūǖĀĒĪŌŪǕáéíóúǘÁÉÍÓÚǗǎěǐǒǔǚǍĚǏǑǓǙàèìòùǜÀÈÌÒÙǛaeiouüAEIOUÜ