Calibre Portable

Calibre Portable is program to manage your e-book collection. It acts as an e-library and also allows for format conversion, news feeds to eBook conversion, as well as e-book reader sync features and an integrated e-book viewer. It features library management, format conversion (all major eBook formats), syncing to eBook reader devices, fetching news from the Web and converting it into eBook form, viewing many different eBook formats, and giving you access to your book collection over the internet using just a browser.

Viewer:

• Much improved search functionality. Now all matches are displayed when searching in a side bar with a few words of context. Also supports searching using regular expressions.
• Edit book: The Check book function has a new, improved CSS checker with support for CSS 3
• Edit book: Add an "Open with" action to the context menu of the files browser to easily open files with external programs.
• Viewer toolbar: Add button to easily change color schemes

Bug fixes:

• Fixes a couple of regressions in 4.9.0 with Check Book reporting false positives and an error when using the source editing view in the comments editor
• Comments editor: Fix inserted blank paragraph being rendered as two lines.
• PDF Output: Fix conversion of files containingelements failing.
• Viewer: Fix failure to open some books that contain unparseable URLs.
• Viewer: Fix data displayed in side margins getting moved out of position when mouse hovers over side margin.
• Book details panel: When right clicking to save the cover, replace invalid characters in the suggested filename
• Fix harmless error popup when adding SSL key/certificate in server settings
• Dark mode: Fix colors in remove all formats except dialog

Improved news sources:

• Liberty Times