While not a single C file, Fossil SCM also uses C with HTML inside it (it uses a custom preprocessor[0] for it), e.g. check the chat.c file[1]. The entire progr

While not a single C file, Fossil SCM also uses C with HTML inside it (it uses a custom preprocessor[0] for it), e.g. check the chat.c file[1]. The entire program ends up in a single binary file too. [0] https://fossil-scm.org/home/file?name=tools/translate.c&ci=trunk https://fossil-scm.org/home/file?name=tools/translate.c&ci=t... [1] https://fossil-scm.org/home/file?name=src/chat.c&ci=trunk https://fossil-scm.org/home/file?name=src/chat.c&ci=trunk