YouVersion - https://www.bible.com/ http://downloadbible.godlife.com/
Audio downloads in over 4000 languages - https://worldbibles.org/
Audio Bibles in over 550 languages - https://www.faithcomesbyhearing.com/
Both mobi and desktop, audio, download and read online -https://www.faithcomesbyhearing.com/audio-bible-resources/bible-is
Easy ENGLISH (ESL) Bible and Study materials - https://www.easyenglish.bible/
Made for mobi, great for desktop too - https://mbible.com/index.html
Online Bible in multiple languages and versions - https://www.biblegateway.com/