This fixes all manner of subtle issues introduced by Qt's broken attempts to map system colors to a QPalette. 1) Highlight color being same as Windows' accent color (this is anyway reverted in Qt 6.6) 2) Window titlebars not following system light/dark changes on Windows. 3) All the custom code that I wrote for tracking system light/dark changes can be dropped in favor of the new QStyleHints::colorScheme property 4) We had a fixed dark mode palette but not a fixed light mode palette. I am sure people, especially on Linux, are going to complain about this, but there are simply too many upsides. I will perhaps add a way to configure the details of the light and dark palettes for people that need it. This dialog could theoretically have a button to try to import the standard system palette automatically to create the custom palette.
calibre

calibre is an e-book manager. It can view, convert, edit and catalog e-books in all of the major e-book formats. It can also talk to e-book reader devices. It can go out to the internet and fetch metadata for your books. It can download newspapers and convert them into e-books for convenient reading. It is cross platform, running on Linux, Windows and macOS.
For more information, see the calibre About page.
Screenshots
Usage
See the User Manual.
Development
Setting up a development environment for calibre.
A tarball of the source code for the current calibre release.
Bugs
Bug reports and feature requests should be made in the calibre bug tracker at Launchpad. GitHub is only used for code hosting and pull requests.
Support calibre
calibre is a result of the efforts of many volunteers from all over the world. If you find it useful, please consider contributing to support its development. Donate to support calibre development.
Building calibre binaries
See Build instructions for instructions on how to build the calibre binaries and installers for all the platforms calibre supports.