The most reliable starting point is the MobileRead Forums Plugin Index . This community-maintained list categorizes hundreds of plugins by their function (e.g., validation, editing, import/export).
A dedicated accessibility checker that ensures your EPUB is readable by individuals using assistive technologies. sigil plugins download
An industry standard for validating your files. The EpubChecker-sigil plugin provides detailed error reports directly within the editor. The most reliable starting point is the MobileRead
Automatically replaces "straight" quotes with "curly" smart quotes, making your typography look professional. sigil plugins download
If you are starting out, these "must-have" plugins solve the most common ebook creation hurdles: