Sigil 1.1.0

Sigil

Sigil is a free, open source, multi-platform ebook editor. It is designed to edit books in ePub format (both ePub 2 and ePub 3). It also provides features for advanced users, like direct XHTML, CSS and XPGT editing. You can use it to add any of the metadata entries supported by the EPUB specification and create a hierarchical Table of Contents.

Sigil key features:

Free and open source software under GPLv3
Multi-platform: runs on Windows, Mac, and Linux (note Linux only receives limited support)
Full UTF-16 support
EPUB 2 spec support with limited EPUB 3 support
Multiple Views: Book View, Code View and Preview View
WYSIWYG editing in Book View
Complete control over directly editing EPUB syntax in Code View
Table of Contents generator with multi-level heading support
Metadata editor
User interface translated into many languages
Spell checking with default and user configurable dictionaries
Full Regular Expression (PCRE) support for Find & Replace
Supports import of EPUB and HTML files, images, and style sheets,
Documents can be validated for EPUB compliance with the integrated
All imported files have their formatting corrected, and your editing can be optionally cleaned
Plugins!

New Features (since the 1.0.0 release):

Added Support for Dark Mode for Windows, Linux and macOSX (Thanks BeckyEbook!)
Added new icons that work well under both Light and Dark modes (Thanks BeckyEbook)
Added ability to use Dark Mode for Preview (controlled by Preferences)
Added Zoom Keys Ctrl +/- support to the Inspector (for improved Accessibility)
Added support for a second Clip bar with up to 20 additional clips
Select Special Character Dialog now support scrollbars
Guide and Nav titles are now translated into ebook language (if translations available)
All Report Names have been shortened to allow larger font sizes for better Accessibility
Added improved contrast icons (Thank you BeckyEbook!)
Completely reworked all Sigil Preference Dialogs to make them more screen/user friendly
Added support for controlling Windows/Linux HighDPI settings
Clips from the Clips QDockwidget window can now be used in CSS Tabs as well.
The plugin interface has been extended to show current colorMode and primary colors

Bug Fixes (since the 1.0.0 release):

Replaced deprecated QSignalMapper code with QActionGroups throughout Sigil's code base
(still more work to do there)
Fixed bug in "open-with" on macOSX that did not allow .app files to be selected
Soft hyphens characters are now handled properly by Spellchecking [PR from BeckyEbook]
Fixed bug in 'split at cursor" that created extra empty pages
Fix bug in Insert Files from Disk
Fixed same thread re-entrancy issues with tab creation / deletion code due to Qt signal/slot handling
Fixed source code typos [PR from luzpaz]
Fixed incorrect number of "times used" in Image Reports
Fixed plugin font_iter() code to properly handle new Iana.org font media types
Broken links are no longer changed during ImportHTML (Add Existing...) operations
Cover svg image "vh" "vw" fixup code now properly handles empty headers on cover page
GetBookpathByPathEnd() will now work properly and thereby better handle detection of file
name conflicts during imports
Better handle file name info from Validation plugins
Inserting Links now creates proper links for top of page of the same file
Fix ImportHTML when creating a new book to properly add an NCX if needed
Include official QT backported fixes to Qt 5.12.6 to make it more stable
The nav will now properly handle internal links to top of page of the nav itself
harden lxml xml processing with resolve_entities set to false for improved security