There is only one file type that uses the .ONT extension:
theWord Bible Text Module
File used by theWord free Bible software; stores a copy of the Old and New Testament; saved in a plain text format and includes tags that markup the biblical text in a format recognized by theWord; also includes the title, description, and version information; used for distributing digital copies of the Bible.
ONT files are most commonly distributed as ".ont.exe" executable files that self-install the version of the Bible when opened.
Updated: January 12, 2012