建议根据字体需求，多个组合使用。高度定制可基于freeType+harfbuzz基础库完成。

GitHub - GNOME/pango: Read-only mirror of https://gitlab.gnome.org/GNOME/pango

GitHub - googlefonts/fontview: Demo app that displays fonts with a free/libre/open-source text rendering stack: FreeType, HarfBuzz and Raqm

盐小咸/sfntly

GitHub - googlefonts/sfntly: A Library for Using, Editing, and Creating SFNT-based Fonts

https://github.com/googlei18n/fontview

mirrors_phil-r/varfonts-ofl

GitHub - googlefonts/fontview: Demo app that displays fonts with a free/libre/open-source text rendering stack: FreeType, HarfBuzz and Raqm

fontconfig 

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创作不易，小小的支持一下吧！