Notion press - Notion Press is a fast-growing self-publishing service proving platform that lets writers and Authors publish their content to enhance their conversion rates.
calibre - Ebook manager, viewer & converter
Xlibris - Xlibris is a writing platform providing software that allows the writer to lift their writing journey.
FBReader - FBReader is an e-book reader for various platforms. Features:
IngramSpark - IngramSpark is an Online publishing services provider platform that allows you to publish or print books that are in high quality, and its global distribution service enables you to post and share around the globe.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.