The recent release of Aspose.Pdf for .NET v.3.8.0.0 announces the support for PDF/A-1b to ensure reliable reproduction of visual appearance of the document. Another new feature of hyphenation based on customized dictionary is also supported. Aspose.Pdf is a .Net component for writing Pdf documents without using Adobe Acrobat. It supports converting HTML, XSL-FO & Word documents to PDF and you can also create PDF by API, XML templates or XSL-FO files. Other supported features include PDF/A-1b, XML meta data, form field creation, bookmark, image formats & security features, hyperlinks, adding footnotes, text & page properties, auto fit to content in table, decimal tab stop, HTML tags and keeping paragraphs together when breaking page.

See more: http://www.aspose.com/community/blogs/aspose.pdf/archive/2008/09/09/aspose-pdf-for-net-3-8-0-0-released.aspx