Sigil

 Sigil is an open source digital book supervisor that includes a WYSIWYG board. As a result, you only get what you see.

You'll quickly get used to it because it works in a similar way to Microsfot Office programs.

Sigil can now export files in EPUB and SGF (Sigil native format), as well as import files in TXT, HTML, and EPUB formats.



Even though the program is still in its infancy, it is simple to use and provides book owners with numerous options.