I stumbled across this product on the net and it didn't come up in a search on the forums (although I might just not be searching properly).
This is not a free tool and it looks quite expensive for a license. However, for the sake of having this information on the forum for people looking for available software on ebook authoring I thought I'd post something.
Features:
- Windows, Mac OS X and Linux
- Truly Wysiwyg
- Conformance to EPUB2 and EPUB3 specifications
- No proprietary pivot format, works directly on your *.epub files
- Creates EPUB2 and EPUB3 books from scratch
- Conformance to XHTML 1.1 and HTML 5 (xml serialization) for content documents
- Full metadata support for both EPUB2 and EPUB3
- Files and directories management
- Full support for Guide (EPUB2) and Landmarks (EPUB3)
- Full support for NCX (EPUB2) and Table of Contents (EPUB3)
- Compatibility output of Guide and NCX in EPUB3
- Full support for Spine (EPUB2 and EPUB3)
- Full support for EPUB3 properties on meta/link/item/itemref
- User interface for direct manipulation of epub:type attribute
- UTF-8
- One of the best CSS editors on the market
- Builtin SVG editor
- DOM view and ActiveView
- Word count
- MathML editor
- HTML Table Layout editor
It seems (on the surface) to be a pretty comprehensive authoring tool. However, I've never used it myself and the asking price of 195 Euros + VAT is pretty steep.
That said, I know we have some professional ebook creators on the forum and if they haven't seen this before, it's probably worth at least a download of the demo to see if it brings anything new or convenient to their workflow.
EDIT: And a working link to the site might be helpful:
http://www.bluegriffon-epubedition.com/BGEE.html