This site has some useful tools set up for Bible software.The Heb12 API is open source. Everything here can be found here: Heb12 API
/download - Download an Openbibles translation
/search - Search the KJV Bible
/get - Return bible data
/translations.tar.gz - Every Openbibles translation (JSON), in all languages. 200MB download.
/translations-json - Gratis.bible data as JSON
/translations-xml - Gratis.bible data
/translations-split - All languages, and translations, but split into books (XML).
A cool web UI has been made at /www