fuchar
Fuchar renders the future font found in the toilet project. The font is built in to the source code of the renderer.
Ex: python -m fuchar --prefix=' <!-- ' --postfix=' -->' --ignore-missing hi there## <!-- ╻ ╻╻ ╺┳╸╻ ╻┏━╸┏━┓┏━╸ --> <!-- ┣━┫┃ ┃ ┣━┫┣╸ ┣┳┛┣╸ --> <!-- ╹ ╹╹ ╹ ╹ ╹┗━╸╹┗╸┗━╸ -->
Future font was originally developed by Sam Hocevar <sam@hocevar.net> and is licensed via <http://sam.zoy.org/wtfpl/COPYING>.