1) Free software programmed in C 
HarfBuzz (loose Latin transliteration of Persian: حرفباز, `Opentype`) is a software development library for shaping of Unicode text{definition|date=April 2014}. The most recent incarnation of HarfBuzz (`New HarfBuzz`) targets various font technologies while the first version (`Old HarfBuzz`) targeted only OpenType fonts. New HarfBuz...