Plumati
8.0#4 in ebook creation softwareFrom $14.99 a monthFree planAndroidiOSWebLinux
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Plumati is suited to authors, teachers, and publishers creating interactive books, quizzes, or course materials. Its range of export formats may also suit teams distributing content across web, desktop, mobile, or learning platforms.
Sigil suits people who want to create or format EPUB books, from personal projects to professional publishing. It is available on Linux, macOS, and Windows, subject to the listed operating-system requirements.