Sigil is described as 'Multi-platform ebook editor. It is designed to edit books in ePub format' and is a very popular Ebook Editor in the news & books category. There are more than 25 alternatives to Sigil for a variety of platforms, including Mac, Windows, Web-based, Linux and SaaS apps. The best Sigil alternative is calibre, which is both free and Open Source. Other great apps like Sigil are Pandoc, GitBook, Vellum and Atticus.
"Scriba eBook Maker" is a project for building ebooks (in ePub, PDF and zip formats) using contents already available in other formats (e.g., HTML, PDF, XML, etc.) both on the Web and on file systems.
Reflowable format allows you to create files for Kindle, print, and EPUB. Readers can adjust the size of eBook fonts, margins, and various properties on Kindle.
A step-by-step self-publishing workspace to write, organize, format, and get your book publishing-ready — without the overwhelm.
Wondershare MePub, a simple yet powerful EPUB creator, can help you build EPUB eBooks from a variety of file formats like MS Word (.doc/.docx), PDF (.pdf), Text (.txt), HTML (.html/.htm), CHM (.chm), and Images (.jpg/.bmp/.png/.tiff/.gif).
Asciidoc FX is a book / document editor to build PDF, Epub, Mobi and HTML books, documents and slides. AsciidocFX is also a winner of Duke’s Choice Award 2015.
NextBook is quick and easy way to buid technical books or documentation that support modern standards and run blazingly fast. It's built with MDX and Next.js and works by compiling markdown or MDX down to plain static html.
As a professional eBook Converter, Any eBook Converter will decode DRM-protected Kindle & Adobe eBooks and convert them to EPUB, MOBI, PDF, AZW, TXT. Besides, you can edit the metadata of eBooks, including the title, author and publisher, etc.
Read e-books in the EPUB file format, and organize and browse catalogs in the OPDS format. Lucidor depends on Pale Moon being installed.
It's not an editor; it's a reader
This alternative is disputed. Lucidor is a legitimate Sigil alternative, but it might have issues that some users think are important.
The ePub Packager is a small and easy to use program that can unpack epub files to make changes or fixes to the ebook and pack the folder back to epub file.
Convert your PDFs into dynamic digital flipbooks even when offline. Access your flipbooks on any device and share them across every channel.
Novelist Freeware is a free in browser book writing application that helps you write your book in a simple and efficient way. It is designed to be easy to use, with a clean and intuitive interface that allows you to focus on your writing.
Create websites online. Edit HTML, CSS, Javascript online. WYSIWYG. Live preview.
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Lucidor is for reading, while Sigil is for writing.